Vintage Writing Box w/ Letter Opener / Magnifier / Old Stamps

Description

Box measures roughly  8 3/4"  x 5 1/2"  x 1 5/8" .
Letter opener is 7 1/2"  long .
The magnifier has no magnification marks on it , so not sure what its rating is .
The stamps are used , dates range from the '1960s to the '1980s .