Hohner double-sided Echo Elite 64-hole tremolo harmonica in the keys of C and G. Sounds great. 

Please see the Auctioneer's Notes at the beginning of this auction where we list John Whitman's Harmonica Anthology 11th Ed. April 25, 2019 as a free and easy source to get more information about specific harmonicas. The harmonica in this lot or one like it can be found at page 176.