Two Antique Miners Lamps Each measures 4 inches High by 2 1/2 inch wide. Reflectors Large 4 inches, Small 2 1/2 inches. These were my great grandfathers and were most likely used at Home Mine in Calif

 

RARE EARLY FRENCH SLIDE RULE " LENOIR " C. 1825, TAVERNIER GRAVET REGLE A CALCUL Here on offer is an absolutely rare and early slide ruler, made from boxwood with one slide, invented and made by famou

 

This auction is for an optometrists lens test set from the 1920's or 39's? Complete with the optometrist office sign. Very rare find. 

 

According to Carl Zeiss "Innovation" Issue 15, Peter Brock founded P. Brock & Co. in Copenhagen in 1905. The company later became Brock & Michelson, and the firm started representing Zeiss in

 

Microscope Accessory: Live Box / Compressorium Fine large live box, Rousselet's design, the brass base plate some 3½"x 1½". Nice condition with the brasswork retaining most of its original lacquered

 

Good selection of early mounts, mainly strews from various locations, with much of interest to observe(see relevant images of typical slides)..

 

This is a vtg ANTIQUE - AMERICAN OPTICAL - 12 K Gold Filled - Lot of 5 - EYEGLASSES. There is on pair, kind of a pinkish metal which is marked Aluma on the temples but bridge is 12kgf. All the rest ar

 

Cool eye antique ophthalmoscope very old museum piece

 

Here we have an antique engineering/maritime graphometer, a rare tool used to calculate straight points on both land and sea. This piece dates from ca. 1780-1820, is constructed of brass and multiple

 

An original and early travel compass in Mahogany case, about 1820 . Fine and detailed dial, working condition with needle lock when case closes. No makers marks visible. Some exterior damage / split t