I've got a flared-rimmed bulbous vase ~8" tall with 4 "pulled-ear" features, (Thanks to Flying-free,

who found it and very kindly put it my way, knowing I would be interested.) so I do believe this to be perfectly right and Mdina, they must have experimented a little with the shapes they put this feature on, but decided that it should be on the flanged rim bottle vases, rather than other shapes.
Do you have any inkling as to what sort of date this one of the OP's might be, John? I reckon perhaps between early and mid-'70s?
I'll take a pic of my vase tomorrow and post it.