Different colored paper inside, printed with their offerings. This may have been one of their first catalogs?
CONDITON: VG (Age discolored cover) -
BN - Brand New in Packaging LN - Like New (no packaging)
VF - Very Fine (slight use or blemish) FN - (some use/wear/still nice)
VG - Very Good (shows wear/use) G - (lots of use/wear)
Explanation of Terms
Vintage - (collectible/early harder to find) Rare - (very hard to find)
NLM - (no longer made or available)