pre war Camp Perry accessory

[CINDERS]

Could it be the rack No. of the rifle it was to be used with perhaps just a thought but probably to obvious.

Information

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[relics6165]

My P. J. O'Hare sight micrometer is marked similarly to FlightRN's, U.S.326, with a slightly different font. The markings are in the same location.

[FlightRN]

Has anyone dug out their P.J. O'Hare micrometers and seen if they had a "U.S. XXXX" number stamped? I'm curious to know where the upper end of the applied serial numbers are.
Best Always,
Michael

[Randy A]

For the folks that are interested in a good sight micrometer (must have for competition) here is the website http://www.ray-vin.com/ click on the "links" in lower right corner to go to SB sales, they took over production of the micrometers.

[Cosine26]

My O'Hare sight micrometer is marked "U,S,298" and came from an old pre WWII shooter, who also competed after WWII up into the 1970's.