Aguirre y Aranzabal No. 4 12 Gauge Side-by-Side Shotgun, 28-Inch Barrels, Mod & Full Chokes, 1950s Spanish Made
This early-1950s Aguirre y Aranzabal No. 4 showcases classic Spanish gun-making with a case-hardened boxlock action, graceful scroll and game-scene engraving, and demibloc steel barrels regulated for Modified and Full choke. Matching serial numbers on all components, Spanish Eibar proof marks, and a Purdey-style double under-bolt extractor mechanism underline its quality and collectibility.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Good – clean, well-maintained, minor wear marks.
Specific Condition Notes: There is a chip at the toe of the walnut stock.
What's Included
- Aguirre y Aranzabal No. 4 12 Gauge side-by-side shotgun
The No. 4 grade features a steel receiver with vivid case colors and factory-cut border scroll framing a flying bird motif. All engraving is factory original and remains sharp, adding both visual appeal and collector value.
The 28-inch demibloc barrels are fitted with a flat, file-cut game rib and a brass front bead for a clear sight picture in the field. Chambers are 2.75 inches, with Spanish 70 mm smokeless proof and 18.2 mm bore stamps confirming original 12 gauge dimensions.
Fixed Modified and Full chokes make this gun suitable for upland or waterfowl work where tighter patterns are desired. Disc-set strikers and an automatic top-tang safety provide reliable function, while double, non-selective triggers deliver traditional control.
The walnut stock offers a 14.25-inch length of pull, crisp checkering, and a pistol grip that pairs with a slim splinter forend. An alloy butt-plate bearing the AyA crest completes the classic profile and keeps overall weight manageable.
Purdey-style double under-bolts lock the action securely, and matching serial number 51829 appears on the barrels, action, forearm iron, and wood, attesting to its original configuration.




