Spanish proof marks from my 1960 AYA Model 400 (precursor of the model 4) 12-bore SxS.
Left to right:
- F*1 = Spanish date code for 1960
- Lion over AYA in circle = AYA house mark
- ‘X’ in shield under plumed helmet = received at Eibar proof house
- ‘2’ superimposed over crossed longarms = definitive proof for double-barrelled breechloading shotguns
- ’12-70′ in cartouche= bore/gauge-chamber length in mm (12 appears to have been re-struck over earlier mis-strike of 16)
- ‘BP’ over small cartouche, in shield = compulsory smokeless proof of breech loading smoothbores
- ‘CH’ in shield superimposed over crossed swords = supplementary ** smokeless proof of breech loading smoothbores
- 900KGS = proof pressure (standard)
** I do not think that this is the same ‘supplementary’ proof as in a UK, magnum-proofed gun (stamped two crowns over SUP). 900KGS is normal, non-magnum pressure.
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