Vox Ampliphonic Mellophonium Mellophone mic pick up hole w/ a clean case

Description

Vox Ampliphonic Mellophonium
Serial #694
Sounds okay for age, can see the original mic pick up on the second picture.
Vox created an entire series of instruments with these attachments.
(I also own a trumpet and clarinet from Vox and have the original audio equipment that King marketed, not included)
Patch and dents pictured. One finger button replaced.
Latch on case not working, but case in solid condition otherwise.
Let me know if you have any questions!