Mod. Russian, China Mech.
I agree entirely with this comment, Timex movements are extremely robust and $5 spares and repair watches on ebay can in most cases be cleaned up and given a quick service and if the dial is reasonable will look good. There are service manuals out there, they come up on ebay regularly, but for mechanicals all you have to learn is servicing the 24 movement, the rest are so very similar. Basically oiling the pins at the escape wheel and the visible pivots in the back plate will get most watches running well, if not either the mainspring is worn or the dial needs taken off and the watch soaked in e.g. lighter fuel and all points oiled - rarely necessary in my experience, I have hundreds bought at an average cost of $14.
Electric watches are also simplicity themselves following the service manuals, you only have to remove the shunt bridge and balance and give them a soak and check the alignment of the contact spring then reassemble and oil. Servicing these watches is a great way into watch repair.
Quartz are a different proposition.
Does anyone out there have instructions for the 43,44,55,56 series of jump minute watches?
Thanks for posting! Great info.
What Dan said.. only worth servicing yourself. But keep your eyes open for nice ones in lots. The some models seem to bring in crazy prices. With that said, I got this from a friend that had a clock shop. Someone brought in a bag of watches, and this Dorado was in the bag. He knew it was gold so only sold it to me for the gold price, which at the time was $200...
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