It is a combination,a rather deep one actually of many composites using a Fender Jazz bass and a Juzek flat back upright double bass dated 1934 with a nice low C extension built in it.It was actually built before that yet was re-tooled in 1934.The fretless part appears a bit out of tune but it is not,my intonation is spot on it.A friend at The Sam Ash Warehouse hooked me up with it and I just got to use it with no rental fee.The flat back Immediatly made me think German but it may be Czech as again it was re-tooled in 1934.And of course you cannot lose with a good Fender Jazz bass.I was expecting to rent a student model high school orchestra type of thing yet as I said,I had a friend in the right place at the right time who came through for me.