Calibre 570 — the 17-jewel variant of the 5xx family

In brief

Not every calibre in this family got the refined treatment. The 570 is a no-date automatic at the standard 17 jewels, from the same run of movements the 550 began.

Short history

The 5xx family widened in 1959 with a group of no-date calibres, and the 570 is one of them. It sits on the standard side of the jewel split that runs through the whole series.

Watches that used it

• Seamaster automatic (late 1950s)