This black and yellow enclosure stamped June/ 2005.
"The Texas Square face was originally designed as a replacement for Stevie Ray Vaughn's fuzz faces, which were always dying. Cesar built his circuit into one of SRVs dead fuzz face boxes and Stevie used it until his unfortunate death. The square face is similar to the Dallas Arbiter Fuzzface, has Volume and Fuzz knobs, but comes in a small MXR distortion+ sized box."