Everything on SerialStitch
Every decoder and guide on the site, in one place. Start with the number you have; the guides take it from there.
The full published register: year allotted, factory, machine class, and the prefix table for all 65 series.
The first three digits name the real maker. Plus Sears' model list with years produced for 400+ models.
The plain-words story of the Sears secret — and why the maker is the key to manuals, parts and value.
Elna USA's letter chart, 1963–1982, and the pre-1963 first-digit rule with its ambiguity shown.
Date a 221 or 222K from the register, tell them apart in 30 seconds, and see the recent sold ranges.
The three steps: find the real number, read its shape, and understand what the register date means.
The honest version: most are $0–$100, a short list is $400–$2,000 — and the four things that move the price.
Brand-by-brand locations for Singer, Kenmore and Elna — and the wrong-number traps that catch everyone.
Pricing from sold listings, value grading, safe start, safe cleaning, parts by maker, and the listing playbook. $39, one time.