https://www.tonewoodforviolin.com/produkt/der-jung-tuner-set-classical-guitar-brass-finish/
Der Jung Tuner Set, Classical Guitar, Brass Finish | Tonewood shop
Black helix, exchangeable buttons, artificial ebony. Nylon shafts, gear ratio 1:18, shaft spacing 35 mm, diameter 10 mm.
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https://www.toneninja.com/tuners-button-upgrades-1/tone-ninja-upgrade-tuner-buttons-set-(6)%2C-tulip-style%2C-black
Tone Ninja Upgrade Tuner buttons set (6), Tulip style, Black
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https://edsgoodstuff.com/archives-c-179/sansui-au517-tu517-amplifier-tuner-combo-recapped-70s-set-p-7775.html
Sansui AU-517 TU-517 - AMPLIFIER TUNER COMBO -recapped, 70's set : EdsGoodStuff -, It's all good...
EdsGoodStuff - Sansui AU-517 TU-517 - AMPLIFIER TUNER COMBO -recapped, 70's set - For Sale: Tested and working classic Sansui integrated amplifier and matching...