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Schild and Cie Hebdomas 8 day pocket watch 6 jewel

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I have a Schild cie hebdomas pocket watch. Can anyone tell me what year era might this be. The only serial number I have is above the Schild Co is BW388SG. On the fold open caseback. Did they still use the the bridge type Balance bridge movement with the balance wheel in the center of the bridge like the open face dial version of the cie hebdomas style. Now for service. This unit has a huge mainspring with a special tooled holddown in the center. If one needs to remove that after the spring tension is relaxed. Does the center screw turn clockwise to open or counter clockwise? 

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I think your travel clock would date from around 1920 give or take 5 years either way, I dont think this movement has the same bridge layout as the classic open face Hebdomas it will have a fairly standard bridge layout with the regulator arm pointing downwards at a 90 degree angle please see this link to a watch it is a movement that will be similar to what is in this clock:

//www.ebay.co.uk/itm/Superb-8-day-w-w-1-1915-officers-silver-miltary-trench-wrist-watch-very-accurate/152857305233?hash=item2397016091:g:q68AAOSw-U1aUmOk

I have one of the watch versions of this movement but it is not in running order the teeth on the mainspring barrel are very delicate and are easy to break which is the case with the watch I have so for now it languishes in the parts bin, but I feel pretty sure the travel clock you have show will be a similar movement.

The screw in the center should unscrew in the opposite direction to the winding direction but either way as long as you are careful you should be able the get it off and be careful lifting the mainspring barrel off 8 days worth of mainspring goes a long way !

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This would around 1920’s to 1930’s going by the style of the case. Depending on the spring, this could be 30 hour or 8day. I cannot remember about the screw sorry. Just make sure you release all the power before attempting to take it apart. In many of these types of movements, the winding gears are prone to wear and slip, all down to the very strong spring in the 8-day ones, due to poor quality metal used in the winding meconium.  

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Was the Schild company or Otto Schild any relationship to the Legendary Adolf Schild the founder of Eterna. Or was this a total different Schild. It seemed like after Graizly turned over to Schild with Hebdow. It seems like the Schild end paled to insignificance. Too bad not more is written about this Company. Now Hebdomas end of it is totally different.

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