SHASTOCK CUP MUTE
VINTAGE MUTE - RESTORED
Here's an example from around the 1950's
It has had a restoration from professional trumpet player/recording artist - Jimmy Smith who runs Smith Mute Restorations in Detroit, Michigan. Corks are replaced, dents (there are a few remaining) and a light spray of lacquer I believe.
Shastock Cup mutes are widely used in Band, Studio and Commercial applications.
The adjustable aluminium cup makes this an extremely versatile mute which is why they remain popular today
Prices are increasing thanks to the NZD$ dropping substanitially.