I bought the Guitar secondhand in 1971 it was blue (unfortunately my brother painted it red). I cannot see a serial number but the numbers 3077 are on the reverse of the nech head. Any information would be much appreciated.
Thanks in advance.](https://my.hohner.de/uploads/db6518/original/1X/5f5caa33707f4e6a878c0e7800f983452368200f.jpeg)