Beautifully made late 70s / early 80s 1st generation style Shimano Dura-Ace middle / inner chainring in black with 44 teeth. This rings is marked with an ‘S’ in a circle which may well refer to ‘Extra Super Duralamin for Serious Racing’ as stated in the catalog as one of the chainring options, or may not.
- 1st Generation (GA-200) black version Dura-Ace chainring
- 44 tooth inner/middle chainring
- 130 BCD
- 1980 date code
- For standard 3/32″ chains to suit 6/7/8 speed drivetrains
- Made in Japan