Glass mushroom - Murano?

The only other glass mushroom with a ground & polished bottom I have found is a similar (but nicer) one with a Murano label. This one is 3.25" high, and 3" in diameter at the edge of the cap.

I found a Rainbow one with very similar frit detail on the top, but it has a rough bottom. I also found a Rainbow one with a pontil mark. What gives?

If anyone has any leads on this one's origins, I'd appreciate. Thanks!

 

Selkirk Glass did mushrooms, some just had labels on them

 

Thank you much. I haven't heard of that glasshouse before - I'll look into it.

 

It may also be a Wedgwood Glass one. Same thing: labels, no engraving.

 

Nice photography!

 

Viking did mushrooms also but I do not recall this color.

 

That isn't frit, by the way.

 

I'm fairly certain everybody who has made glass has made mushrooms.

 

A fair few. I've lots of Mdina ones. Not made by Whitefriars, oddly.

 

OK...almost everybody

 

Thanks for all the other leads, everyone!

I always thought that spotted pattern was achieved by "frit pickup" on hot glass, then a reheat to melt the frit. Is there another term, or another technique I'm thinking of instead (or haven't heard of)?

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George, the Viking mushrooms mainly look like this (several sizes) - molded stem, textured under cap, and polished base: