Both came off an Eclat, but one has the correct PCD, stepped bore, stamped ET19, dated 1981.

The other has the right PCD but looks like an Excel bore, stamped ET30 and dated 1978! The Speedline wheels didn't appear until the S2 in 1980.

Have I got some kind of wierd prototype wheel? Or was Lotus experimenting with time travel with the Deloreans they had on site?