Rikstone C15 with Celestion Alnico Blue speaker. 
The preamps are based on Matchless DC30.
The power amp and the tube rectifier are from VOX AC15. 
The amp includes a rectifier switch on which either a tube or semiconductor diode rectifier can be selected. See the more detailed picture.

Technical data:

Inputs:             2 x Ch1, 2 x Ch2
Outputs: 16 and 8 Ohm
Controls:  Volume (Ch1)
Tone (Ch1)
                     Volume (Ch2) 
Bass (Ch2)
Treble (Ch2)
Master volume with by-pass
Stand-by switch
Rectifier switch
Tubes: 1xEZ81, 3x12AX7, 1xEF86, 2xEL84 
PT: 230/300V-0-300V/120mA/6,3V/4A
OT: 8000/16/8 Ohm
Rectifier: EZ81/semiconductor diode
Speaker: 12" Celestion Alnico blue (15W)
Schematics: PowerSupply1
PreAmp1
PowerAmp1
PowerSupply2
PreAmp2
PowerAmp2
PowerSupply3
PreAmp3
PowerAmp3
User's Guide: Description (in Finnish only)