pre war Camp Perry accessory

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.

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

Quote:

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Originally Posted by Frederick303

Have one, it takes while to use correctly. One is certainly not making elevation corrections like we modern shooters do with it, as you have to do the following to make a correction:

1) at the start of the match have the tool fit to you preset adjustment, that is when you fit it over the leaf it is exactly set with no wobble.
2) if you want to make an adjustment in the match you fitrt it on the leaf:
3) the loosen the sight elevator screw .
4) then make the sight correction to the tool
5) then tighten the sight leaf screw
6) then remove the tool.

That said it does allow for precision adjustments of the analog scale .

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Works better (and faster) if you leave a "slight" tension on the sights set screw. Use the micrometer to drag the sight to setting, set the screw, back micrometer off 2 clicks and remove. Quick and easy

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.

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.