This does look like the Danish version, but I would list it as a civic issue of the town of Visby rather than a royal issue of
Sweden or
Denmark. According to Bendixen (Denmark's
Money) the early specimens of this
type date back to about 1340 when Visby was under Swedish control, and they continued to be struck after the Danish capture of Visby in 1361. The coin's inscriptions remained unchanged,
MONETA CIVITATIS WISBVCENCIS, not mentioning any particular
king or nationality. On the later Danish version the banner above the
lamb is changed to a flag with a
cross according to Bendixen. I've attached pictures of coins from my
collection that I think show both
types.