I also have a Hohner Fretless bought in 1969 for $300 including a Kustom 100 watt amp. It has all the original strings, plastic wrapped 2 in blue, 1 in red, & 1 in yellow. I tried once many years ago to replace the strings, thinking that they must have gone bad over the years, but the new strings would not play in tune, and I had to put back the originals (thank God I had not thrown them away!) and those 44 year old strings still play like new! It has an adjustable neck, by means of a 1/4 inch bolt accessible at the nut between the middle strings. I could never find a serial #, but I wouldn't take it apart to find it. A great bass to play, and I would not give it up for anything!
