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The Comparator, Precision Instrument, C.G. Conn Ltd.

The Comparator, Precision Instrument, C.G. Conn Ltd. Elkhart Indiana
Price:
 
$19.95

  

Stock #: 583320
Type: Postcard
Era: Real Photo
City: Elkhart
State: Indiana (IN)
County: Elkhart
Postmark: 1948 Sep-5
PM City: Schuyler
PM State: NE
Stamp: 1c
Size: 3.5" x 5.5" (9 x 14 cm)
Additional Details:
Hair looks like pencil lead. The Comparator, precision instrument used by C.G. Conn Ltd., world's largest manufacturer of band and orchestra instruments. For checking irregular shapes. Shadow of part to be checked is thrown on the screen and enlarged up to 100 times. Naked eye easily sees 1/30th diameter of a human hair.

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