Appreciate this is from a few months back, however the discussion was useful to me and I wanted to contribute, having a few Marin frames I am working on. If anyone needs some parts to be weighted let me know.
Here are the photos on the scale of three Marin Rockstar forks.
- Dark grey Bear Valley (not the SE) 1993, 20.5 inches (the largest frame), Frame reference starting M83, "CM / CM" engraved on steerer, dropouts stamped "Spinner":
974g
- Light grey Eldridge grade 1993, 19 inches (steerer 183 mm), frame reference starting M63, dropouts stamped"Tange": 864g (may be 1 to 5g of dirt here and there):
864g
- Black Eldridge grade 1992, 19 inches (steerer 183mm), can't see any dropout stamp, 750g sticker, CM/CM engraved on steerer:
910g
This also seems to match what a fellow member said
here: a 1994 "750g" version with 183 mm steerer at 865g
For the Eldrigde grade 1993 I can't see the "CM / TB" but there is some sort of paint on the steerer and it is most likely under this. I don't know if there was yet another fork even lighter than this 864g or not.
I should add that between the 1992 fork and 1993 forks the tubes are slightly different, it's not exactly the same shape.
Those forks are pre 1997 and therefore have the ~395mm axle to crown, deemed more "racey".
Rebuilding a 19 inches Marin Team issue myself as light as possible and for commute, if anyone has any recommendation of fork in the 400 / 410mm, not stiff and light, please let me know. I am looking at Kona p2, or am on the market for a 1997 onwards Marin.