Bob,
Indeed it is. And it is mated to a Certus can that that received a flower sticker many moons ago. These flower stickers (as used on the Cukras motors) were very popular in the late 1960s, as the unfortunate era of beatniks and peaceniks-at-any-cost-including-freedom began rotting the civilized world. You could buy little packets of those stickers just about anywhere. I recently found a few of those new packets at Mothers, so if anyone is trying to restore a Cukras motor with a damaged flower sticker, send me a note, I will send you one.
Doing so gives it a lower CoG but also makes it wider.
That would be if you use the Tore Hammer and smash a Mura D-size can into submission. But in the case of the "B" can, it is not any wider than a 16D or a Mura "A" motor. Just lower.
The other survivors from Lake Whatever are a 1980s production Mura C-can motor with purple endbell, another with the late 1980 hole pattern and orange endbell, another with the elephant ears from the early 1980s, a standard "B" production motor from 1969 (square hole, last attempt to make that pile to work), and a Lenz second-series with the pentroof brush holders dating from early 1969.
They will require some serious cleaning and de-rusting to be presentable again . . . just what Edo loves to do in his spare time.