The Fujifilm GW670III is the 6x7 sibling of the GW690III, released in 1992 for export markets only rather than for domestic Japanese sale. It shares the same third-generation rubber-clad body but frames in the ideal-format 6x7 ratio, giving ten shots per roll of 120 instead of the 690's eight.
It carries the identical EBC Fujinon 90mm f/3.5 lens as the 690-series - here framing slightly tighter, roughly a 45mm equivalent - in the same leaf shutter with speeds from 1s to 1/500 plus T. Like all the Texas Leicas it is fully mechanical and meterless, with a coupled rangefinder, double-stroke advance, top-plate spirit level and the under-base actuation counter.
The 6x7 frame enlarges to standard paper sizes without cropping, which made the GW670III attractive to portrait and wedding shooters, and today it is meaningfully rarer than the GW690III because of that export-only status and shorter effective run. It offers the same optics and handling as its bigger-negative sibling, usually at a similar or slightly lower price, and rarity is starting to tell in UK listings.
The used checks mirror the GW690III: read the baseplate counter (units of ten actuations) to gauge how hard a life it has led, confirm the rangefinder patch is aligned at both close focus and infinity, and cycle the shutter at the slow end for lag. Additionally verify frame spacing across a full roll, as the 6x7 gearing is specific to this model and a body with spacing faults is a specialist repair; check too that the correct 670 masks and finder framelines are present rather than swapped 690 parts.