concordance · mechanism
How do we know any of this?
Short essays on how factory documents work, why they vary, and where the production numbers come from.
8 entries
Chrysler — broadcast sheets, fender tags, plant overlays5›
- What is a broadcast sheet?
The form that traveled with the car down the line.
- Why are Lynch Road tags different from St. Louis tags?
Plant clerical practices vary, and Lynch Road famously omits A34 callouts.
- Who is Galen Govier and where do his production numbers come from?
The reference for Mopar production figures, and what 'registry-attested' means.
- What changed about Mopar paint codes in 1969?
Two-character codes became three; the model-year letter prefix shows up.
- Why was the broadcast sheet stuffed in a seat spring?
Because line workers had to put it somewhere.
GM — SPID labels, RPO codes2›
- What is an RPO code, and why does GM have both three- and four-character codes?
Regular Production Options, the GM equivalent of broadcast cells.
- What is a SPID label, and where does it live?
The sticker that survived, or didn't.
Restoration & documentation1›
- What does 'numbers matching' actually mean?
A loose phrase tightened.