The grade 57 is an early 18 size design, key-wind and key-set, having 11-13 jewels depending on the exact production run.These early Elgins have a "tangential" lever escapement, or "English style" lever, rather than the improved Swiss style used by Elgin later, and in watches to this day.
On this watch the lever pivots at a tangent to the escape wheel, rather than pointing directly away from the escape wheel at 90 degrees from the tangent.
This example, with an especially low serial number, was made about 1871.
No comments:
Post a Comment