If you do a search there are a few hits. I thought they were built on the older Purdey style lock-up with underbolts. Holts sold a pair for 5200 bps + commission in March 2020. Here's the description:
VICTOR SARASQUETA
A RARE MATCHED PAIR OF 12-BORE 'MODEL 14' DOUBLE-TRIGGER OVER AND UNDER SIDELOCK EJECTORS, serial no. 82118 / 82330, with extra barrels,
29 1/2in. nitro barrels with raised solid tapered matt top-rib, gold-inlaid '1' at the breech end, side ribs, the tubes engraved 'VICTOR SARASQUETA. EIBAR. ESPANA', 2 3/4in. chambers, bored approx. full and extra full choke, minor dents and rivelling;
29 1/2in. nitro barrels with raised solid tapered matt top-rib, gold-inlaid '1*' at the breech end, side ribs, the tubes engraved 'VICTOR SARASQUETA. EIBAR. ESPANA', 2 3/4in. chambers, bored approx. 1/4 and 3/4 choke, minor dents and rivelling;
29 1/2in. nitro barrels with raised solid tapered matt top-rib, gold-inlaid '2' at the breech end, side ribs, the tubes engraved 'VICTOR SARASQUETA. EIBAR. ESPANA', 2 3/4in. chambers, bored approx. extra full choke in both, some dents and with pitting internally and externally;
29 1/2in. nitro barrels with raised solid tapered matt top-rib, gold-inlaid '2*' at the breech end, side ribs, the tubes engraved 'VICTOR SARASQUETA. EIBAR. ESPANA', 2 3/4in. chambers, bored approx. 1/4 and 3/4 choke, some rivelling and dents;
hold-open toplevers gold-inlaid '1' and '2', carved and pieced at the thumbpieces with sea serpents, manual safeties with gold-inlaid 'S' details, short side bolsters, gold-inlaid cocking-indicators, articulated front triggers, profusely engraved with fine acanthus scrollwork with floral and ribbon designs, the undersides with recessed elliptical cartouches gold-inlaid around the inner edge 'VICTOR SARASQUETA EIBAR', retaining much original colour-hardening and finish, 14 1/2in. figured stocks including 1/2in. wooden buttplates, weight 7lb. 5oz.
Ken