Hello all, i'm new here and would just like some general info about my amp. It's a JMP 1979 2203 Mk2 Master Volume 100watt. I bought it in 1986 for 120.00 UK. It's a great amp. I had it serviced by Marshall in M Keynes around 1993 and have had no problems with it since. Are these sought after and how many were made? etc. I'll post a picture of it if you want to see it. Many thanks.