Those pics are great - exactly what was needed, with several views which is wonderful.
thanks.
It has a rather low profile to be able to work out if an S shaped tool was used or not. The S shape on the tool was probably ~2.5 inches tall, 1.25 inches wide.
(I don't currently have an example to check, I'm going by memory)
I'm not overly happy about the small lobe of clear glass that sticks
right out, I don't think that looks quite right for a knobbly, which would be smoother.
I do not know about indents in anything wfs, but Chasdevlin's comment seems to make sense - I've not seen indents.
I'm also a little worried about how lopsided it appears to be.
It could be Czech/ Bohemian.