Data downloads
Stable CSV downloads of everything the site renders. Free to use with attribution to howoldismyunit.com.
| File | What it holds |
|---|---|
| /data/brands.csv | one row per brand: parent, categories, rule count, official lookup URL |
| /data/formats.csv | one row per serial format era: pattern, example, decode rules, status, sources |
| /data/lookups.csv | official warranty / serial lookup URLs with verification status |
Columns
formats.csv: rule_id; brand (the brand the source documents); family (brands the source lists as sharing it); product_types; from_year / to_year (blank = not stated); pattern (anchored regex, matched against the upper-cased serial with spaces and hyphens removed); example; year_rule, week_or_month_rule, plant_rule (the source's wording); ambiguity; confidence (the researcher's); status (VERIFIED / PARTIAL / UNSOURCED); decodable (whether the site's engine evaluates it); sources.
brands.csv: link_status is whether the parent-company relationship was verified against a source.
lookups.csv: status VERIFIED = URL returned 200 and the page is a serial-based lookup; PARTIAL = 200 but the mechanics were not confirmed; NONE = no online lookup exists.