Custom SEIKO SRP307 "Monster" BUILD/Mod w/ OEM Parts. This is NOT a factory build, but rather an amalgamation of OEM parts (put together by yours truly) that make up this "Monster". This is what we have here: an OEM SRP307 dial, handset, and 4R36 movement dropped into a 1st Gen Monster case assembly.
The golden SRP583 knurled 2nd gen crown completes the look. The caseback reveals everything--it's stamped "7S26-0350".Yes, the caseback is compatible but not accurate (or else it would have'4R36-01J0' stamped). That's why this would be classified as a build/mod rather than a factory assembled, but at least it's all put together with OEM parts.
4R36 movement, like the original. 1 Running movement, 4R36 Seiko. 2 In very worn cosmetic condition, with moderate wear throughout article. Scratches on bracelet, clasp, and the edges of case and bezel.
Slight dings to the mineral crystal. 3 Will fit 6.75 wrist at maximum.
TLDR: 2nd gen dial and handset, 1st gen case and bracelet, 2nd gen crown, mineral crystal, and running original movement. Moderate wear and tear all over the watch.