As part of getting it ready for Cirque, this morning I installed a NOS Wipperman chain on the '38 Paramount, replacing the "modern" inch-pitch roller chain (Thank you again, Ted ERnst, for digging deeply into your reserves for the chain!).
The roller chain looked bulkier as I was matching lengths, so I weighed them. The roller chain is 28% heavier. For the length I needed, the roller was 445 gm, almost a pound, and the block chain was 3.5 oz (98 gm) lighter.
Why, you keep that up and it's almost a quarter-pounder (but not after cooking) :-)
Of course, in either case the 3/16" fixed gear cogs could be used for small boat anchors, but that is another story...
harvey sachs
mcLean va