Vintage ESC - What is it?

[Npdp72]

Can anyone reliably identify this vintage ESC?
I did buy it new myself but not sure after 25 years if its a Laser, Nosram or whatever?
It fits under the top deck on my ProCAT so its not too huge for its age and it has two adjustment potentiometers and a L shaped alloy heatsink under the clear shrink wrap.
And a long shot probably but does anyone have instructions / manual for it? (if such a thing ever existed!)
Thanks.