The Pignose 7100 launched in 1973 as the original portable battery powered amp, it was pretty revolutionary in it's day. You can still get a brand new Chinese made example, but this quirky little piece dates to around 1979 and was made at the original facility in LA, USA. It's in terrific shape for it's age and has that charismatic barky growling tone. Heaps of fun and a handy little collectable. 

Model: Pignose 7100 
Made: USA, 1979 approx (serial 25612)
Output: 5 watts
Power: 6xAA batteries or 9v DC negative standard supply (not included)
Speaker: 5" 
Finish: brown tolex
Mods: none
Weight: 2kg
Extras included: none

Condition notes: used, fully functional. There's a few minor scuffs on the tolex, no major marks. Overall: excellent condition (9/10)