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The Seiko 6306-7000, first so-called "Turtle", was produced in 1976, shortly replaced by the 6306-70001. The model I'm servicing is from July 1976. The known issues were a stem malfunction and obvious rusted hands. As I haven't taken an worthy picture of the initial state, here is a picture from today, with the original and dirty glass but restored hands. Before opening it an additional issue appeared ; the watch suddenly stopped. Due to a crushed gasket and maybe old greases, a black paste migrated in the movement, between a pinion teeth. For the movement my cleaning process was pretty simple and I obtained good results. I pre-cleaned in warm water with soap, q-tips and tooth-brush. After drying the parts, I washed them in lighter fluid, then inspected them one by one and cleaned them again when needed. Final rinse with IPA. Now the stem issue. On the left the stem from a 6309, on the right my 6306 stem The spring is rusted, the flat washer is missing. In fact, the washer was probably lost, and a ugly workaround generated more issues ; on the inner side of the crown, nibbling the crown gasket... I have good results by using oxalic acid to remove the rust. Questions: 1. what kind of material could I use to make a new flat washer ? 2. I plan to heat the spring, stretch it a bit, then temper it. Is it a good idea ? -
I'm not sure I follow along here. In situations where I've had a broken stem, I've removed the stem during the disassembly of the keyless works. Of course, if the stem hinders the movement from being extracted from the case, that's a different situation. Ah, I think I get it! The OP only wants to replace the stem, not service it? -
Dell it is a cardboard tube. My blue steel was in something very much like it and yes the steel is as hard as hell. -
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Thanks - yes that makes sense. I’ll try that.
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