Vintage Silva

Description

Siva Map Measurer with leather cover...I THINK this is a "type 40" from comparisons to listings on other sites...the plastic covering is dirty on one side & I was afraid to use anything abrasive to clean it off. I figured someone who knows how to use it would know how to clean it...and I didn't want to make it unusable. You can see the condition in the photos...
This is from an estate closing & didn't I have fun researching this...Grampa was a private pilot & at first I thought it was a "pilot" gadget, but then the family told me Grampa also had tried backpacking & they thought this was part of his hiking gear...