Sharp microwave grill combi-oven (The Grange Estate SG6)

Sharp R-92STM microwave 900W / grill 1100W / convection oven 2500W, in silver, 28 litres capacity.
Outside dimensions : 52 cm width x 33.5 cm height x 51 cm depth, weight 19.5 Kg.
In good clean condition, the microwave function works well but the grill hasn't been tested by me,
but I believe this works well as my Dad did use this function.
No instruction booklet is to hand, however these are available on the internet.