Big Beat Combo set is/was supposedly a functioning playable instrument, there can be little doubt that it was marketed as a toy for the younger player unlike the plastic guitars of Maccaferri which were intended as serious instruments. The lettering on the original box (included here in this sale) states that the guitar is of 'Professional size - 30" long', so I'm guessing the scale length is going to be somewhere around the 20" mark, perhaps a little over if we're lucky. The ebay seller (who insists on referring to this as the 'Big BOAT Combo' which makes no sense whatsoever) thinks this might be from the 1960s, which is probably a fair guess. I'd say 1960s or maybe early 1970s.
The set comes with a small plastic battery-powered transistor amplifier with a 4" speaker plus a contact mic style pickup which is attached to the body of the guitar by suction pads.
Currently listed on eBay with a starting price of $14.99 and no bids at the time of writing.
G L Wilson
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