Sven
Cruisin' on my Bluebird
You have some pretty good leeway in matching chains to sprocket spacing.
"8-speed" chains match down to 3 or 4 rear cogs on 115mm OLD (prewar to 1960), and these chains will work on everything made to 2000.
Easy to substitute 9-speed chains on 7 rear cogs, etc. - I also know people doing it the other way.
FWIW, I noticed Wippermann chains run slightly narrower than SRAM for the same chain width designation.
Holy Link, batman...chains are as confusing as wheel sizes, anyway just found this on ebay
This one is apparently for 10 speed ( 5 rear cog ) bikes. Then there is the Wippermann Connex 800, 804,808.