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 Fig. 1  Fig. 2 | Junghans J47a Features stem wind and set sub second Data 18.5''', Dm= 41.9mm, Do= 42.7mm H= 5.25mm F= 0.7mm T= 2.4mm 7 jewels f = 18000 A/h power reserve 32h Balance staff U410 Stem W294 Mainspring / battery Zf3503, 2.00 x 16.5 x 0.21 x 470mm Hands 1.82 x 1.15 x 0.27mm Comments about the data | Remarks 1930- open face calibre family/generations: old designation disregarding the grade: 47: old click with integrated spring 47G: new click with separate spring, since ca. No.20000 new designation indicating the grade, since ca. No.93000: 47a: 7 jewels, flat hairspring 47b: 15 jewels, flat hairspring 47c: 15 jewels, Breguet hairspring 47d: 15 jewels, Breguet hairspring, bimetallic balance 47e: 15 jewels, flat hairspring, without second, for blind persons watches suffix /1: separate escape-wheel cock The "G" for the new click appears also together with the new designation up to ca, No.106000. Example, year: signature; shock device ca. 1935: 087808, Junghans 47, G - 8384 (Junghans J47G) 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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