A1 Silverplate Quality Mark Marks: How to Identify and Date Them

The letters 'A1' (sometimes 'AA') stamped alongside or near 'EPNS'/'EP' marks on silverplated items, used by manufacturers as a commercial (not legally regulated) quality grade indicating a heavier-than-minimum silver deposit.

• There was no independent, legally enforced standard behind 'A1' -- the precise silver thickness it implied varied by maker and era, so the mark cannot be used to infer an exact plating thickness the way a legal hallmark can.

This research could not find a government, museum, or company-archive source (only specialist antique-reference sites) for the A1/AA grading system; it appears to have been an informal trade practice rather than a codified standard, so several sub-details (exact micron thickness, first year of use) are left unverified rather than asserted.

Turn the piece over and light the mark from a low angle with a lamp or phone torch, which throws the impressed or engraved lines into relief; a printed or painted mark wants soft, even light instead. Fill the frame with the mark, then take a second shot of the whole piece. Do not clean tarnish off silver before photographing; the mark reads better dark. The app matches the mark and shape to the notes above.