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 Fig. 1  Fig. 2 | Alpina 228 (Junghans J43a) Features stem wind and set sub second hack feature Data 19''', Dm= 41.85mm, Do= 43.25mm H= 4.5mm F= 0.6mm T= 1.8mm 15 jewels f = 18000 A/h power reserve 35h Balance staff U387 Stem W324 Mainspring / battery Zf3032, 1.50 x 16.0 x 0.21 x 440mm Hands 1.60 x 0.85 / 0.27mm Comments about the data | Remarks 1929- hunter calibre monometallic screw balance Breguet hairspring The Junghans J43 with separate escape-wheel cock was after Junghans made especially for Alpina (Alpina 238), and from the real world also the Alpina 228 with monometallic balance is known, which would have the according Junghans designation J43a. It is uncertain whether these calibres were also applied in Junghans watches. family: monometallic screw balance, staff pressed: 227: open face 228: hunter bimetallic screw balance, staff riveted: 238 hunter Example, year: signature; shock device 1929: 01678, Alpina 238 - 1678 (Alpina 238) 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. |
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