Vintage BRISTOL One Stage Power Amplifier - Model F.   Manufactured by the Bristol Company, Waterbury, Conn in the early to mid 1920's. Walnut cabinet, Bakelite panel, lift top, single tap switch, one 201A tube, battery operated.  Battery posts & caps all in place.  Case & panel is solid with little wear. 

This is a very nice example of the early 1920 amplifier units produced to increase volume of radios in use at that time.  It will be securely packed to arrive safely at your home.  Please do not hesitate to ask questions before bidding....