Check the thickness of the headstock. The Golden Age tuners have a baseplate which is .720" (18.29mm) wide. It might be too wide for your Mark IV! I remember Hans said something like the original tuner baseplate was only 17mm wide.How about these Golden Age Classical tuners from Stewart MacDonald? Would they work?
Non-members can’t see the pics there. Can you just tell us the two important measurements: barrel center to barrel center in mm., and headstock thickness.Looks like bad news for me. These Kolbs are not 35 mm. Here is the thread I started on the Unofficial Martin Guitar Forum. I am able to upload pictures there. I have a diagram there with measurements and pictures of my elderly Kolbs.
https://umgf.com/guild-mark-iv-replacement-tuner-recommendations-t195300.html
Thank you for any help you can provide.
Roger
Yeah, celluloid plastic, especially "vintage stuff" will continue to beak down over time.That was a good idea, Roger. I'm not sure anything will stop the barrels from disintegrating over time, but you've bought yourself some time.
I agree, or if not actual original parts, he often has suggestions as to what he'd actually use if he was restoring/repairing the instrument himself.I think you should continue to try to follow up with Hans as he might actually have parts for you. Anyway, best wishes.
I thought there was a video on casting the knobs too, but I can't find it.