This is a PedalPCB exact clone of the original Marshall Bluesbreaker, the famous overdrive pedal that spawned a million imitators, most notably the Analogman King of Tone and JHS Morning Glory (both of which are variations on the circuit). The only exact replica is the recent Marshall reissue, but it's in a huge enclosure and a bit spendy. This blue powder coated enclosure is the lower profile MXR-style 1590b and was built by a great Reverb seller I will link below so you can check out his hundreds of 5-star reviews and listings. He's well-known in the Milwaukie guitar community and a friend of Greg Koch, which is good enough for me.
This pedal is wonderful as a boost to low to medium gain od. Full Google details below.
Note that import clones like the NUX Morning Star and Mooer Blues Crab are NOT the original BB circuit. Nothing is, other than the Marshall reissue and part-for-part replicas like this one.
The price is $50 firm.
SW Corvallis.
https://reverb.com/shop/jamess-shop-267
Here's the Google overview:
The PedalPCB version is a faithful circuit that clones the legendary vintage Marshall Bluesbreaker overdrive pedal. It replicates the transparent, low-to-medium gain "amp-in-a-box" clipping characteristics of the 1990s original, fitting neatly into a standard 1590B enclosure. Op-amp-based gain stage with soft-clipping diodes, mirroring the later Marshall revision values (such as the 3.3k/4.7k resistor pairing) for a punchier, brighter response. Delivers an open, transparent crunch that cleans up well with the guitar's volume knob. Works exceptionally well as an "always-on" sweetener, a clean boost, or stacking partner to push an already saturated tube amplifier or another overdrive