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Fig. 1

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Fig. 2

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Fig. 3

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Fig. 4

Hamilton 21 (ETA 2442)

manual wind

6''', Dm= 13.5mm, Do= 13.75mm
H= 3.2mm
F= 0.8mm
T= 1.6mm
17 jewels
f = 21600 A/h
power reserve 41h

Balance staff U2753

Stem W2771

Mainspring / battery
1.43 x 5.5 x 0.0625 x 201mm

1.00 x 0.50mm

Comments about the data

early fixed (Fig.1), later mobile stud carrier (Fig.3)
indirectly driven minute allows a very big balance
differences not known between 21, 211

Example, year: signature; shock device
1-2) ca. 1960: 34, 17 Jewels - DWH (WH in D), Patented; Incabloc
(ETA 2442)
3-4) ca. 1965: BP, Swiss, Swiss, 17 Jewels - Patented; Incabloc
(ETA 2442)

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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