Information below given by chatgpt based on the pictures as there are only a few marking on the shotgun I have included in the ad. ChatGpt is not always 100% correct so please do your own research based on the pictures, but it is marked 2 1/2 in chamber. It is marked British made. and the top of the barrels is marked silver arrow. There is no discernable manufacturer marked anywhere on the firearm. CHATGPT DESCRIPTION: Your Silver Arrow 12 gauge is almost certainly an English trade gun from the Birmingham gun trade, not a Belgian double as I initially suspected. The strongest evidence is the proof-mark layout on the barrel flats and the fact that a "Silver Arrow" shotgun appears in Martin Pulverman's 1929 Birmingham gun catalog. That catalog offered numerous British and Belgian doubles under trade names. From your photos, I can make out several important markings: "NITRO PROOF," a 12-bore diamond mark, and what appears to be a 2 1/2-inch chamber marking. Those are consistent with an older British Birmingham-proofed sporting shotgun. The gun is a traditional boxlock side-by-side with double triggers, likely built for the export/trade market rather than by a famous London maker. What I believe you have Detail Assessment Trade/model name Silver Arrow Gauge 12 bore / 12 gauge Action Boxlock side-by-side Triggers Double trigger Extractor/ejector Appears to be an extractor gun Proof British nitro proof Chamber Appears to be 2 1/2 inches Serial 94096 Likely origin Birmingham, England Approximate period 1920s-1930s, likely around the late 1920s Silver Arrow name Likely retailer/trade model rather than manufacturer The 1929 date is particularly interesting. A surviving catalog from Martin Pulverman of Birmingham, England specifically lists a "Silver Arrow" gun among its offerings. That doesn't prove Pulverman manufactured your shotgun-Birmingham firms routinely sourced guns from actual makers and sold them under proprietary names-but the name, period, configuration, and British proofs make this a very strong lead. Condition From the pictures, this one actually presents fairly well for its age. The barrels retain substantial blue, the action engraving is still clear, the checkering remains visible, and the stock has attractive figure. I do see considerable finish wear and discoloration on the buttstock, plus normal handling marks.