Whats thus

[kook]

Does any knowlagable person tell me what this is

 

[Rumpelstiltskin.]

Solid Brass Divider Drafting Proportional Tool 6" Navigational Compass Caliper | eBay

 

[kook]

Thank you

 

[chookey]

Marine navigation compass.
Google lens is your friend here Kook

Asmara Nautical Solid Brass Proportional Divider Marine Navigation Compass With Wooden Box A : Amazon.co.uk: Sports & Outdoors