The Rikstone H45bm is based on Fender Bassman (circuit AA864).

Technical data:

Inputs: 2 x Bass and 2 x Normal
Outputs: 8, 4, 2 Ohm
Controls: VOL, BASS, TREBLE, Deep switch
VOL, BASS, TREBLE, Brilliance switch
Power, Stand-by
 
Tubes: 3 x 12AX7, 1 x 12 AT7, 2 x 6L6
PT: Uraltone TV10
OT: Fender
Rectifier: Semiconductor diodes
Schematic: Fender Bassman, AA864