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Thrak · 10-18-2009, 02:27 PM

thats what the guarded crown on the left is for, you can turn the interior dial for calculations on the slide rule

the white ring turns as you turn the left crown

http://www.amazon.com/gp/product/B0018AJNI6

look at the zoomed in pics there

10-18-2009, 02:27 PM	#86
Thrak .. the man from Nantucket Join Date: Jan 2009 Location: Canton, GA Posts: 558 Trading: (2)	Re: Wristwatch collectors out there? thats what the guarded crown on the left is for, you can turn the interior dial for calculations on the slide rule the white ring turns as you turn the left crown http://www.amazon.com/gp/product/B0018AJNI6 look at the zoomed in pics there