This watch has a cylinder escapement, instead of the jewelled lever type which is preferred for reliability and accuracy. It also used the “pin-setting” feature. The button on the edge of the case is pressed inward to allow setting of the hands when the crown (winder) is turned. The bridge style movement is very common in Swiss watches of the last decades of the 19th century, so identifying this as a watch of Brandt origin can’t be nailed down, unless the movement has an identifying trade mark. The name engraved inside the case back was done by an engraving machine, not done by hand. This would indicate to me that the name was added when the watch was already very old. As to spending a bunch of money having it serviced? Only if you are desperate, and are prepared to waste your money. Not too many watchmakers will work on watches with cylinder escapement.
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