Loom content (IBM vs MAC)

[Ahenobarbus]

What are the differences between Loom IBM and MAC box contents?
I have two sealed ones and the MAC version weights 358 g even with the Hintbook enclosed sticker!
IBM 1.st release weights 432 g.
Museum doesn`t give a clue where the weight difference is coming from. There are obviously disc differences (3,5" vs 5,25") between the boxes, but ibm is 74 grams heavier and my scale should be pretty accurate!
Is it Adventurer magazine or something else?

 

[Ahenobarbus]

Thanks Omar and sorry to answer so late, I have been quite busy in last two weeks.

Something is definitely floating inside the box when I`m turning it around. MAC box seems to have folded corners and my old IBM release glued corners.

 

[Ahenobarbus]

Here is a better picture: From left to right there is: Loom IBM (glued), Loom MAC (folded), MI2 (glued), DOTT (folded).
(Loom boxes are in different order in earlier picture Aug.5)

1x Box. 100g
3x 3.5" floppies. 65g
1x Cassette. 63g
1x Manual (Mac). 12g
1x Book of Pattern (later, no viewer). 38g
1x Hint book (no plastic seal). 82g
This roster seems to be pretty accurate, thanks again omar