1) Right here we go with a plainer version of an eisglas dekor box on our board, with engraved roman numerals XXXXVIII !! Knew I'd seen something on the board at some point but that was in 2009!! The OP discusses it being 1948 because of those numbers. I think it's also 1800s and the numbers are just there to match base to lid as with mine.
http://www.glassmessages.com/index.php/topic,25682.msg142067.html#msg1420672) Just going back to my last post re dates, the sugar box in the Technisches Museum Wien inv. no TH 12106, 12107 was '1840 acquired from Josef Lobmeyr, Vienna' (source, Farbenglas I, Neuwirth) so the fruit/vegetable form sugar boxes date a bit earlier than my comment above. That one sits on a matching leaf shaped plate.
3) I suspect mine could have had an underplate with it as with the green and white one. And because it has the stalk and is supposed to represent a vegetable I think it could have been a plate with a scalloped edge to represent a leaf form/greenery if you see what I mean, rather than a plain rounded rim plate.
4) It's made me think on my other Eisglas pieces. I have a leaf shaped bowl/plate that has a significantly indented oval middle. I've always wondered about these leaf shaped plates and what they were for/why the shape.
http://www.glassmessages.com/index.php/topic,35577.msg193030.html#msg193030Today it's dawned on me that it they were probably for boxes or salts to sit on. Mine is probably for one of a pair of salts in oval base/foot form or something similar. The indented base is not big enough for a bowl/box base but it would be perfect for something with an oval shaped foot.
My eisglas salts have a round domed hollow foot unfortunately but I'm sure something like those would have come with an oval foot shape as well.
I'll post a pic later to demonstrate my thinking
(edited - see pic attached)
5) Here's a link to an Eisglas Muschelschale dish - Neuwelt c.1860 for date reference:
https://www.liveauctioneers.com/item/18081483_muschelschale-aus-eisglas