The Rikstone H40W is an A class amplifier with spring reverb. The amplifier part is based on Matchless Chieftain. 

Technical data:

Inputs: 1 x Normal,  RETURN
Outputs: 16, 8, and 4 Ohm, SEND
Controls: VOL, BASS, MID, TREBLE, BRILLIANCE, REVERB, MASTER
Tubes: 5 x 12AX7, 2 x EL34
PT: 230V/280V/250mA
FT: 6,3V/6A
OT: A transformer for two EL34s, 50 Watt
Rectifier: Diode bridge
Schematics: PowerSupply
PreAmp
PowerAmp