The Marconiphone 253AC is a 3-valve (plus rectifier) TRF receiver designed to operate from AC mains of 200-250 V, 50-60 C/S.

A similar chassis is employed in the Marconiphone 254 and 271 AC radiograms, in the HMV 436 and Columbia 355 AC table models, and in the Columbia 620 AC radiogram.

(ref. Trader Service sheet 573, Wireless and Electrical Trader, June 6, 1942)  See http://www.radiomanuals.info/

As found this set was in a pretty poor condition.  The original turntable had been replaced with a cheap 1950s model and the cabinet wasn't great - though free of worm.  It wasn't felt worthwhile to restore, but dismantling it revealed that the mains transformer had been replaced with a rather more substantial type.  The speaker was in good order and all valves were present. 

Valves

Valve	Anode	Screen	Heater
V1 MS4B	230V 3.5mA	62V 0.6mA	4V 1A
V2 MH4	40V 1.8 mA	-	4V 1A
V3 MPT4	250V 36mA	210V 6.5mA	4V 1A
V4 U12	25mA DC each anode	-	4V 2.5A

Note the valves in this set (the Marconi ones are probably original) are glass, not the metal Catkin types.