Hello and thanks for checking out this new set of 52/42-tooth Shimano 600 BIO-PACE chainrings! I found a small stash of these rings in the back stock of a high-end bicycle shop, each will come to you in the new-without-packaging condition seen in the included photographs.
Perfect for your 1990's road build. Rings are new but show faint signs of "shop wear" from storage the past ~30 years.
Please see the included pics of the rings you will receive.
Contact me with questions, I will do my best to answer them. Review my feedback and buy with confidence. Thanks again.