1969 Marshall JMP Model 1968 Super PA 100 watt guitar amplifier head, made in England, ser. no. 1531A
![File:1970 Marshall JMP 1968 Super P.A. 100W - Preamp stage (1999-06-10 13.15.59 by germanium).jpg - Wikimedia Commons File:1970 Marshall JMP 1968 Super P.A. 100W - Preamp stage (1999-06-10 13.15.59 by germanium).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/7/74/1970_Marshall_JMP_1968_Super_P.A._100W_-_Preamp_stage_%281999-06-10_13.15.59_by_germanium%29.jpg/1200px-1970_Marshall_JMP_1968_Super_P.A._100W_-_Preamp_stage_%281999-06-10_13.15.59_by_germanium%29.jpg)
File:1970 Marshall JMP 1968 Super P.A. 100W - Preamp stage (1999-06-10 13.15.59 by germanium).jpg - Wikimedia Commons
![Marshall Vintage 1969 Marshall JMP Super PA 100 Watt Amplifier Head 1960's Amp For Sale The Music Locker Marshall Vintage 1969 Marshall JMP Super PA 100 Watt Amplifier Head 1960's Amp For Sale The Music Locker](https://www.vintageandrare.com/uploads/products/67854/4299284/original.jpg?1703992353)
Marshall Vintage 1969 Marshall JMP Super PA 100 Watt Amplifier Head 1960's Amp For Sale The Music Locker
![File:1970 Marshall JMP 1968 Super P.A. 100W - Phase splitter and power supply stage (1999-06-10 13.17.38 by germanium).jpg - Wikimedia Commons File:1970 Marshall JMP 1968 Super P.A. 100W - Phase splitter and power supply stage (1999-06-10 13.17.38 by germanium).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/a/aa/1970_Marshall_JMP_1968_Super_P.A._100W_-_Phase_splitter_and_power_supply_stage_%281999-06-10_13.17.38_by_germanium%29.jpg/1200px-1970_Marshall_JMP_1968_Super_P.A._100W_-_Phase_splitter_and_power_supply_stage_%281999-06-10_13.17.38_by_germanium%29.jpg)