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View picture in original size
Fig. 1

Ronda 1037

manual wind
sweep second
day: set by +/-24h
date: quickset by reverse setting

10.5''', Dm= 23.3mm, Do= 23.7mm
H= 4.8mm
(dial spacer +0.1mm)
F= 1.8mm
T= 2.7mm
7/17/23 jewels
f = 18000 A/h
power reserve 41h

Balance staff U3254

Stem W3215

Mainspring / battery
Zf1035, 1.40 x 10.0 x 0.10 x 360mm

1.80 x 1.30 x 0.20mm

Comments about the data

stem mechanism without setting-lever spring
strange: train and hand gear separately driven by the barrel (cf. Ronda 9011)

pin lever / Swiss lever:
1x11/1x31: manual, no second
1x13/1x33: manual, sweep second
1x15/1x35: manual, sweep second, date
1x16/1x36: auto, sweep second
1x17/1x37: manual, sweep second, day, date
1x18/1x38: auto, sweep second, date
1x19/1x39: auto, sweep second, day, date
1x21/1x41: manual, sweep second, digital display
1x23/1x43: manual, sweep second, alarm
1x26/1x46: auto, sweep second, digital display
1x66/1x86: auto, digital display incl. second
x=0: 10.5'''
x=1: 11.5'''
x=2: 12'''
x=3: 13.5'''
suffix -21: 21600A/h
Swiss-lever movements normally have the singature RAX under the balance, but some also RL like the pin levers.
Not all variants were actually made. Only those are listed, which are actually known or contained in current registers.

Example, year: signature; shock device
ca. 1970: RL, C2, Delaware Watch Co, Swiss, 17 Jewels; Incabloc
(Ronda 1233-21, 21600A/h, 12''')

Not for Sale!
The movements presented in this caliber finder are not for sale. This is only a data sheet for identification and evaluation of the movement calibre, as well as for approximate dating.

bidfun-db 21.3 © 02-08-15, mtr-Ranfft

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