I know I promised the answer yesterday but Life just got in the way...
So here I am with the answer to the " WHAT IS IT?"
This is an OPISOMETER ......
It is a Nautical milage" calculator" for drafting map scales
The roller on the left side of the photo measures the distances on a map and turns the figures from centimetres (German spelling) to kilometres.
Turning the meter over the instrument figures statute miles...kilometers ...and nautical miles
It also has a mechanical pencil.
I have no idea where we got this antique but we are ready to sell it on eBay.
I am amazed how many there are up for sale at the current time.
Thanks for playing along.
If and when it does sell, I will certainly let all of you know.
6 comments:
Well, I was kinda on the right track, but yet not close.
Good grief! I didn't even know that such a thing existed! Good to lern something new!
Well, I would never have guessed that.
I’ve never seen one of these before. Interesting!
Well, I have learned something new. Pretty interesting I have to say!
I"m sure there is an old sailor out there that would love to add that to a collection. Good Luck!
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