Ovation of New Hartford, Connecticut, are known - of course - for their acoustic guitars with roundbacks made from synthetic materials. To a lesser extent they are also known for their high quality solidbody electric guitars during the 1970s with models such as the Deacon, Breadwinner, Preacher, Viper, and Magnum Bass. What they are less known for is their semi-hollowbodies such as this Typhoon III bass from 1971. This particular example is fretless, albeit with a lined fingerboard. The seller doesn't mention if this is an original feature or if it was converted. Nevertheless, a shortscale bass would seem a strange choice of instrument for the fretless treatment, but it's not without precedent.
G L Wilson
Guitarz - The Original Guitar Blog - now in its 9th year!