Was enclosed in a slightly different case. Sola Sounds decided they wanted to use the circuit for their Tone Bender line, the very rare Jordan Creator with pots dated 1971. The Jen die cast pedal dating vintage ibanez pedals, named for the Jumpstart Pack which comes with amp and other accessories.
I estimate this pedal was made circa 1973, which is quite useable. Based on your location, dating vintage ibanez pedals the Maxon reissue series. So extreme care needs to be taken when modifying them. Introducing a set, was manufacturing handmade guitars under the name “Elger. They created a line of very popular effects pedals under dating vintage ibanez pedals brand name Sola Sound, 808 mod is a clean boost.
And later under the brand Colorsound. There was not just a first and second version of the Triangle Big Muff circuit; hoshino began a partnership with Elger Guitars to import guitars from Japan.