Nobels make one of the most famous 'transparent overdrive' models out there, the ODR-1. Those are around, but this is a trickier find... but, very worthwhile. It's a boost, with a whole lot of rocketfuel available via the gain control and a very powerful two band EQ. You can get your amp cooking in all sorts of interesting ways. Big secret sauce energy here.

Model: Nobels PRE-1 Preamp/Booster 
Made: China, 2000 approx
Serial: none/obscured
Type: overdrive
Power Input: standard 9v DC centre-negative supply or 9v battery (not included)
Accessories: none

Condition notes: used, no major marks. Tested and fully functional.
Overall: very good condition (8/10)