Smith Corona 1903A3 rifle info

[Craig Eberhardt]

If the "A" can be seen when installed , it's 0.537 high. Each letter up ( B , C , etc. ) will be .015 lower in steps , which equals 2MOA change. If the letter is stamped low , so as to be hidden when installed , those run one step higher than the above ( a low A equals a high B ) .
Chris

Thanks Chris