This, friends, sounds terrific. My understanding is Lovepedal only made 100 of these v1 Pro Valves, so there's not many about. The tone is in the Marshall genre; it's somewhere in the Bluesbreaker-ish thick juicy distortion category. The two gain knobs mean you can have two levels of scunge on tap easily. 

Model: Lovepedal Pro Valve v1 Overdrive Pedal
Made: USA, recent model
Type: overdrive, bluesbreaker voice approx 
Power: standard 9v negative supply (not included), current draw 15mA approx
Switching: true bypass
Equivalent new street price (approx): $350aud
Mods: velcro attached
Condition notes: used, no major marks, excellent condition