Unusual find, and looks complicated star finder. This would a great gift for the astronomist. JN and N students and practicing navigators will find the Calculator particularly useful to set the USPS Star Finder (formerly HO 2102-D) as LHA Aries is much more easily and quickly found than by arithmetical computation. It is also useful for pre-set star sights in combination with Volume I of HO 249. The Calculator is quite accurate enough for these applications as it has a maximum error of about ±1°. For those with interests in astronomy, an added step will give local sidereal time, LST, to comparable accuracy. Comes with original case, instructions, and 10 dics. I do believe it is complete.
Condition -great vintage.
Another shopper has this item in their Cart or Wish List
Something Special-for Someone Special