Benrus ER = ETA 2371

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11 1/2”’ | Hand Wind | Swiss Lever | Sweeping Seconds |

Remarks:

When setting the time, the movement adjusts itself forward or backward within certain limits

Listing ID: 1488
Manufacturer / Brand: ETA / Benrus
Caliber: Benrus ER = ETA 2371
Size: 11 1/2'''
Shape: Round
Winding: Manual (Crown)
Hand Setting: Crown
Seconds Hand: Sweeping seconds (central seconds)
Escapement: Lever (Swiss, English, Glashütte)
Date & Day: None
Jewels: 17
Setting Lever Screw/Pin Position: Left
Balance Position: Right (0 - 120°)
Shock Protection: Incabloc
Beats per hour: 18,000
Balance Type: Monometallic screw balance
Power Reserve: Approx. 48 hours
Production Period: Around 1957
Identification: Train wheel bridge marked MODEL ER 23 (the 23 does not appear to be part of the caliber designation. At least it is not in the movement identifier catalogs). Marked 2371 under the balance. An ETA 2371 is not listed anywhere, but the ETA 2370 is the base movement of the Benrus ER. It is possible that the ETA 2371 was produced exclusively for Benrus.
External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-45#post-6068853
Country: Switzerland