Featured Huge pressed glass platter, etched art deco

This is unmarked and image search didn't find anything similar. So looking for help from @TallCakes and others. Diameter is 17" or 43 cm. Total height is 1-1/4" or 3cm, base and edge rim. Color looks a bit weird in pics but it is clear with the etched design. Has enough wear on the base to be from deco period or later. Etched decoration from the back, shown in latter pics. Bought out of an Boston estate with no other info. Gut feel is Scandinavian or possibly American? HELP!

p.s. I just noticed the three designs are not identical but have subtle differences between them, so appear to have been hand done. I always assumed done from a template, but it doesn't seem so. If interested I can show the three with new pics.

 

check Heisey #5003 "Nimrod' c1930s; torte

Glass Etch and Pattern Gallery (chataboutdg.com)

Heisey, Nimrod Clear | Replacements, Ltd.

 

Wow, I wasn't expecting such a quick reply! There is no H diamond, so that is clearly optional. Thank you!!

 

As in Nimrod the hunter, I presume. That's a lovely thing.

 

Nimrod was one of a very few 'sand carvings' that Heisey did, sand blasting using stencils. The designs were primarily art Deco, but not totally limited to that style.