POTTERTON PROFILE 30E 40E 50E 60E 80E MODEL OF SIEMENS PCB 407677
Potterton British Gas 30 F2 - 41-589-74. Potterton British Gas 40 F2 - 41-589-77. Potterton British Gas 50 F2 - 41-589-78. Potterton British Gas 60 F2 - 41-589-81. Potterton British Gas 80 F2 - 41-589-97.