[WTS] Seiko Bell-Matic 4006-7020 — 17J Automatic Mechanical Alarm — July 1968 — Anthracite Dial — Original Bracelet $250

Seiko Bell-Matic, reference 4006-7020, dial code 7050T AD. This is Seiko’s legendary mechanical alarm watch — the only one they ever made — housing the Caliber 4006A, a 17-jewel automatic movement running at 19,800 bph with two independent mainspring barrels: one for timekeeping, one for the alarm. The alarm works. The chime fires — that distinctive metallic strike of hammer on curved spring. Not a beep. Not a buzz. A mechanical alarm from 1969. Case: Stainless steel | 38mm diameter | 13mm thi...