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The Thomastik mandocello strings (Set 1804) work fine on a L&H mandocello. It's what I've used on mine for years and years. I wouldn't use anything else for love or money.

Thomastik only makes one set of mandocello strings, set 1804. So you don't have the choice of light/medium/heavy, like you do for mandolins.

I use Thomastik strings (and only Thomastik strings)...

Felt was probably to dampen the sympathetic vibration of the strings south of the bridge.

Please, someone buy this before I do, save me from myself:

http://www.folkwaymusic.com/vintage-instruments/all-other-vintage-not-guitars-/1922-lyon-healy-mandocello-0915/

Lyon and Healy...

If you're in the market for a K4, I'd look instead at the one for sale at vintage-instruments.com, which, besides being undamaged, is also a Loar-era instrument with a truss rod (not to mention...

I believe those pictures were the same pictures used in a 2012 ebay auction. I strongly suspect a scam.

Take a look here (sales price was $12,100):
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