Antique magnifying glass or loupe from the early part of the 20th century. Made in England, around the 1920's.

It is in a good working condition, the lense is still intact and very clear. 

The case is made of nickle-plated brass, this plating has completely vanished/ worn, not uncommon after 100 years of usage. 

In the round part on top used to be a very small compass, this has not survived on this one 

The length  (without attachments) is 37 mm., the width is 24 mm., and the thickness is 10mm.