Concerning American guns, from the 1940 "Shooters Bible": Browning Superposed's new "Lightning" model came with 3 standard choke combos: M/F, IC/M, skeet/skeet. Anything else was an extra charge.
No standard chokes listed on Parkers. LC Smiths were "bored to order". Fox Sterlingworth, standard chokes were F/F with 32" barrels; M/F with 30 or 28"; cyl/M with 26". Other barrel borings, no extra charge. All the Savage Fox Model B's were M/F standard, no charge for other borings. Marlin 90, 26" IC/M; 28 or 30", M/F. Iver Johnson Hercules, all M/F except 32" 12ga and .410 which were F/F. Winchester Model 21, bored to order.
As noted above, the "choke" marking on British guns first appeared under the proof rules of 1887. It remained as part of the proof rules until 1955. Under the rules of 1925: "Choked barrels could still be stamped with the word CHOKE; this was optional if constriction was from .004" to .008"; if it were more, the choke stamping was obligatory."
