If the Shimano has that green/grey tinge, I expect it would be 1055/1056, downtube shifters and brifters were available in that groupset. I have the groupset (brakes, FD and RD, brifters) if you're interested.
@Acliff started
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If the Shimano has that green/grey tinge, I expect it would be 1055/1056, downtube shifters and brifters were available in that groupset.
I have the groupset (brakes, FD and RD, brifters) if you're interested.