Quite the amazing colour- dark purple Potterton brochures X2 for the Fireside 51 and 52 BE Combined Gas Fire and Gas Fired Boiler. Scarce ephemera for a classic 1970s gas heating system. Plus coral pink card user's guide; "put in a Potterton" colour brochure for the Fireside 51; installation guide for Commodore circulators 130, 180 and Mini models; and Orange installation and setting instructions for the venotrol 80 (Bristol).