Don't know. I did find a place that still claims to support them so I
sent them an email. They are Van Lu.

Man I looked everywhere for a chain for an old electric Wen I bought for $5 at
an estate sale. Finally found one hanging on a wall in an old hardware store
marked for $2 - dusty as hell. The guy was surprised anyone bought it. Didn't
have any more or I would have bought a spare.

Dave Hall