Emilio:
Very unusual gun. Frank's question about the 3rd bite refers to the two locking bolts that act on the rib extension. What makes this action so unusual is that there are TWO top fasteners, instead of just one (many doubleguns have none at all). This unusual arrangement is described in the legend engraved on top of the right barrel. I can't make out the name, but it looks like it says "P. Vurrial's Four Bolt Mechanism". This refers to the four locking bolts present - the common two Purdey underbolts, plus the square Scott crossbolt, and a spindle bolt that engages the doll's head from the side.
Top fasteners that engage a doll's head are common, but I've not seen this design before. Entirely dissimilar from Westley's C-Type. Looks similar to Webley's PHV-1 type, but engages the left side of the doll's head rather than the rear. Certainly a unique action.
Unless Altendorf & Wright were absorbed by another gunmaker that survives today, there's little chance that the records have survived. Without a barrel address, 1904-1915 is probably the best you can do on the date.
Note the engraving on the action but with no name, and maker's name on the barrels only. Most likely is was bought in from the trade and retailed by Altendorf & Wright.
