Lego 375 Castle is the first Lego Castle set ever. It was sold for about 6 years, from 1977 to 1983. The set contains 779 pieces, mainly yellow. 375 Castle is the last appearance of the 1x1x1 window pieces.
My 375 Castle set has some missing stickers, I'm sorry!
Including a real working drawbridge.
Almost all walls are turnable.
The biggest tower, including the 1x1x1 window and 4x1x2 fence pieces.
The castle contains 8 blue knights: 1 with a lance, 2 with a sword and 5 with an axe.
The set contains 1 white and 3 black brick-built horses.
Some rare/cool pieces:
a big flag
a turning rope piece
6 1x1x1 window pieces
4 helmets (the same as the 1980 space sets)
4 visor pieces (in grey, white, red and black)