What does a Winchester factory letter show?

Winchester’s surviving factory records are not held by the company that made the guns. They live at the Cody Firearms Museum in Cody, Wyoming, whose Firearms Records Office searches them for a serial number and issues a letter reporting what the ledgers recorded. It is the closest thing to the original factory entry an owner can hold.

Two things a letter is not: it is not a certificate of authenticity for anything the factory did not record, and it is not a valuation — it establishes what the books say, which appraisers then price.

• Serial number applied on. The day the number was stamped — collectors call it the Polishing Room date. It is the day the serial-number tables record and the day the law treats as the gun’s date of manufacture.
• Received in warehouse / shipped from warehouse. When the finished gun was logged in and when it left on an order. The gap between numbering and shipping is usually weeks, sometimes years.
• The gun as recorded. Caliber, barrel length, stock, sights, order type — when the Warehouse ledger holds your serial, the letter carries the factory’s own description of it.
• The clerk’s notes. Special orders, repairs and returns, destinations — the margin notes that can move an appraisal.

How much of that your letter carries depends on which record system holds your serial. The Warehouse ledgers describe the gun as it was finished; the Serial Number Application ledgers record only the day the number was stamped. Which of the two holds a given model and era is a fact about the records — the letter reports whatever the surviving ledger kept.

Date of manufacture. The serial-application date is the one the law and the trade use. Where the published tables disagree — the collector tables and the factory records are years apart on some serials— the letter reads the original ledger instead of an estimate.

Antique status. US federal law treats guns made before 1899 as antiques, and on every model that crossed that line the tables draw it in different places. A serial in one of those windows is exactly what a letter settles. The pre-1899 cutoff, model by model →

Originality. A letter is the factory’s own word on what the gun left New Haven wearing — caliber, barrel, stock, sights — which is what a collector, an appraiser, or a buyer’s inspector is actually asking for.

The other 29 models with serial records are not on the sheet, and no letter exists for them at any price — mostly the later guns and the acquired brands: 9422, Canadian Centennial, Cooey, Model 20, Model 25, Model 40, Model 50, Model 54, Model 56, Model 57, Model 59, Model 77, Model 88, Model 98 Signal Cannon, Model 100, Model 101, Model 190, Model 250, Model 270, Model 290, Model 370, Model 490, Model 670, Model 1200, Model 1300, Model 1400, Model 1911 SL, Pattern 14, Super X Model 1. For those, the published tables on each model’s page are the best evidence available.

Ordering makes sense when the answer has to stand up:

• You are selling, consigning, or insuring a collector-grade gun.
• Your serial sits in a disputed window — the pre-1899 antique line most famously, or any serial where this site’s sources disagree.
• The configuration is the question — a special-order feature, a caliber change, a documented repair.

And it does not, when:

• Your model is not covered — there is no letter, whatever a seller claims.
• Your serial falls outside the ranges listed above.
• Every source already agrees about an ordinary gun, and nothing legal or financial turns on the exact day.

The Records Office takes orders through its own page: you provide the make, model, and serial number, and it returns the letter with whatever the ledgers hold. The fee depends on membership status, with additional letters priced by membership level, and as of September 2026 the office says letters are typically mailed four to six weeks after payment. The dollar figures live on its page, not here — they change, and a stale number is a bad answer to a purchase question.

GunSerials has no relationship with the museum and nothing to gain when you order. This page exists because the letter is the document most of the questions on this site end at. Before ordering, check the coverage table above — a number outside it cannot be lettered.