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 Fig. 1  Fig. 2  Fig. 3  Fig. 4  Fig. 5  Fig. 6 | Langendorf 1233N Features automatic sweep second Data 12''', Dm= 27.2mm, Do= 27.6mm H= 5.45mm F= 1.2mm T= 1.6mm 21 jewels f = 18000 A/h power-reserve 45h Balance staff U2060 Stem W2271 Mainspring / battery Zf1211, 1.50 x 9.0 x 0.10 x 290mm Hands 1.40 x 0.90 x 0.22mm Comments about the data | Remarks first automatic family from Langendorf differences not known between 1233N, 1261N Strange design of winding mechanism (Fig.4, 5): The crown wheel is not directly coupled to the ratchet wheel, but over a rocker cutch A with two wheels to a separate pinion on the pawl wheel B of the automatic gear. This inreases the efficiency of self-winding, because no parts of the manual winding gear are moved, but the high gear ratio between crown wheel and ratchet wheel makes manual winding rather slow - more an "emergency winding" to start the watch. Attention: Differing from most automatics, this one has no click for the ratchet wheel. The click C (Fig.5) ist the only to disable the maimspring from unwinding. So before removing the automatic bridge, the spring must be unwound. There is a hole above the ratchet wheel screw, allowing to control unwinding with a screw driver, if the stem is not mounted. Saving height (Fig.6): With an intermediate wheel A between central minute pinion B and a separate minute wheel C, this minute wheel no longer overlaps the barrel. The result is a lower profile without reducing sturdiness or accuracy, and actually this movement belongs to the thinnest automatics of the 50s. family/generations: 1133: 11''' 1233, 1261: 12''' 1235, 1262: 12''', date suffix N: automatic modified Example, year: signature; shock device ca. 1955: Lanco-Rotor, 1233, Swiss Made, 21 Jewels - LWC; Incabloc (Langendorf 1233) 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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