It's things like this set that keep me up at night working on my Unofficial LEGO Sets/Parts Collectors Guide updates even longer!!

OK... Set
#1... the Yellow Castle Set 375.
The 375 Yellow Castle was introduced in Europe in 1978, and it appears in 1980 in UK/Australia. Nothing new or surprising here...

In Canada the 375 Yellow Castle first shows up in the 1981 Canadian catalog. But it doesn't mention it as being a NEW item. Hmmmm. The Canadian version of 375 has bilingual text on the box top... again, nothing new here... except that the box is bilingual and mentions a piece count...

And then it gets tricky....
The USA Yellow Castle set was introduced in 1981 as number 6075 (and earlier European 375 Instructions change to "375/6075" Instructions...
But wait... there's a slight glitch here... such as 375 USA Yellow Castle Sets of 1980... 😲

I never saw this set before... 2 original owners claim that their parents had it special ordered from Europe to the USA... it came with a part count sticker on the box top... and a "Made in Denmark" sticker over the EU text on the side of the box...



And in the box were the 1980 USA catalog (no Yellow Castle mentioned in 1980) and the 375/6075 Instructions (which appear to anticipate the 1981 introduction of 6075 USA Yellow Castle)... but with a 1980 EU "labeled over" 375 box...

Price sticker of USA 375...

So it appears that some Yellow Castles were sold in the USA a year earlier (1980 as 375) than we thought (1981 under 6075)... 🧐
This was a surprise!! Looks like some American LEGO parents became aware of the existence of the 375 set, and may have inquired with TLG Enfield to ask why it wasn't available in the USA, and wished to order this set. And so some were likely shipped over from Europe before the 6075 became available in the USA in 1981.
And of course in 1981... the 6075 was introduced in the USA exclusively... with the same 375/6075 Instructions.

More weird stuff I uncovered in the 1980s yet to come... 😳
Comments
Lots of American kids likely went to Germany (and other countries) back then... and saw how great the LEGO assortment was there, compared to the USA (and Canada).
I remember seeing a stack of 20 7740 Intercity Trains in a Toy Store... and wondered why they weren't sold here in the USA. 😳
My young friends next door, across the street and at the end of the block all got the LEGO bug from me at that point, and had their own LEGO collections within a year... all from seeing what I got in the mail. So the Atlantic wasn't as wide as one would think for young LEGO collectors... 😉
I can believe that parents would call or write to LEGO and ask how to get the Castle sets.
I'm in the process of preparing to get rid of my #375 (for various reasons) and this tread and that ideas book won't help with that.....
The 6000 Idea Book was sold in the USA from 1980-85. But apparently since there are so many LEGO Yellow Castle images in that booklet, the first year (1980), which is the version you have... it has that disclaimer about no LEGO Castle System sets... YET... in the USA.
But starting in 1981, when the 6075 Yellow Castle set was introduced, the 6000 Idea Book no longer had that disclaimer... and the idea book continued production without it up to and including 1985. Here is a copy of the 1981-85 version of the same page...
Here is the entire 6000 Idea Book (1981-85 version) on Peeron...
http://www.peeron.com/scans/6000-1/
This 6000 booklet is likely the best reason why some EU 375 Yellow Castle Sets were brought to the USA in 1980... to satisfy inquiries for this set from parents of children who own the early version of the 6000 Idea Book of 1980.
Riddle solved! 😊
There are instructions from that era (e.g. http://peeron.com/scans/7740-1/19) with instruction text and stickers printed in different languages so would this version of 6000 be released in non English speaking countries too?
Yes, on the Brickset main page, "more..." then down to "Library" then Ideas Books there are scans of a non-USA #6000. That version has nine different languages.
And also released an American only version mentioning sets not available in that country when they could presumably have cut the pages with the Castle sets from it?
My head hurts!
I don't know why the international version couldn't have been used in the USA: English is one of the languages in the international version!
I tried several Google searches on the Playhouse Toys, and surprisingly I found nothing. But since this price sticker is over 40 years old, it may just have closed shop long ago, and no info was available for the internet.
https://forum.brickset.com/discussion/38066/possible-different-year-of-introduction-for-an-old-set
You make a valid point about the price stickers... but the large Enfield sticker on the side of the box, and the parts count sticker on the box top... I believe that tells us that it did indeed go thru Enfield CT. A retailer (US or EU) wouldn't do that.
Image: Christian
Here we have an advert for Germany's SPIELZEUG RING (German independent toy association). Both the 6383 Public Works (USA only), and 6391 Cargo Center (USA/Canada only) were sold in select toy association stores in Germany in 1984.
The USA only 6383 was in production from 1981-83, so leftover sets were shipped to Germany, along with new (1984-86) 6391 sets. No changes were made to the boxes of these 2 USA produced sets sold in Germany, except for the addition of a German price tag.
He also brought an enormous double-tank supersoaker back on one occasion. Needless to say I was the envy of my neighbourhood.
The 1592 Town Square Set was a 1980 UK promo set for Weetabix breakfast cereal.
This UK flag version of 1592 was also sold in Germany as a SPIELZEUGRING exclusive, circa 1981-83, as seen in their catalog... (Image: Christian)
The UK box version of the box was sold in Germany without any box changes.
Several other collectors claimed that the 1592 also had a limited sale in Sweden and Australia, but I have not found any confirmation.
They UK version of 1592 was also exported to Canada (Samsonite of Canada (LEGO licensee) as a limited Sears of Canada department store mail-order set...
The Canadian Sears box was identical to the UK/Germany box (both produced in Denmark), but with the addition of a Samsonite of Canada sticker on the side of the box...
Then in 1983 Unilever Corp. sold the Dutch version of 1592 set (with Dutch flag and signs) as a UNOX cereal promotional set...
One Dutch LEGO collector told me the anecdote that when he and his 2 brothers were young, their parents sent away enough UNOX soup labels to qualify for 3 1592 sets. What was interesting about this was that when the sets arrived at his house... there were 2 Dutch 1592 sets, and 1 UK 1592 set. The UK version must have been leftover from the 1980-82 UK (and elsewhere) promotions.
Now wondering if and where the 1592 set was sold in Australia and Sweden?? 🤔
Images from my digital Unofficial LEGO Sets/Parts Collectors Guide.
The USA 6075 Yellow Castle, and the rare early 375 USA Yellow Castle sets, as well as the 375 Yellow Castle sets of Continental Europe, UK and Australia... all had the same identical packaging in common. Namely that there was a box top flap that opened (northward) showing the box contents in a single 4 partition molded gray plastic, sealed with a single sheet of molded plastic as seen in this MISB 6075 set...
However... the 375 Yellow Castle sets of Canada (Samsonite) had English/French bilingual text on the box, and also had no front flap to open up to see the contents. The Canadian 375 had 2 end flaps to open and remove the inner packaging...
And the contents of the Canadian 375 had no single molded gray plastic tray inside, but instead had 2 separate cardboard boxes with open tops... (Images: Innis Mason)
Samsonite of Canada (1962-88) went off on their own when it comes to LEGO sets and packaging, and there are a HUGE number of variations of Canadian sets as far as packaging goes, as compared to LEGO sets elsewhere. There were some sets sold in Canada, which were shipped from Denmark, and had same packaging, just an extra sticker to mention Samsonite of Canada.
So many variations.... LEGO Mayhem! 🙄
Ahh, memories... I remember wanting all of these sets as a kid, and my brother getting the motorcycle shop, AND they did not need to have a crime being committed at the establishment in order for LEGO to make it a set.