Hello Paul and Sue !
Thanks for taking time to share your thoughts! Well I must have missed few things describing it... Yes, it is definitely 100% silver plate - there was a light tarnishing to the silver which I cleaned but there is some left between the letters.
I believe the base metal is alpacca metal ( German silver) used by WMF or another hard metal such as metal blanc which Cristoffle of France used for cutlery and kitchen vessels.
Sue, I think you are very close to what I was thinking - to my opinion it looks either German, French or even Czech but not American or Italian.
I Just didn't wanted to affect your opinion by saying it and was just hoping that someone have seen it somewhere- it is hard to forget it with these letters on the lid

It is just that it is written in English that keep me from attributing it to a German or French company.
What I think is that this jar could have been a limited order for a hotel or restaurant chain or even a cruise liner ship and then privatized by a guest.
Companies like WMF, Christofle etc. are known to have produced such items and sometimes not marked.
There is no symbol but just number 18 which I have seen on some German and French items such as both Christofle and WMF.
The wear on the bottom to my opinion matches the age I proposed but I could be wrong - I made couple photographs- take a look!
There are few other things that make me believe this jar is of superior quality..
first is the pontil mark- not too many producers will bother to make it that perfect but it typical for European glass makers. It it just perfectly polished- you can even see the lines from the wheel.
Another thing is how the metal ring is fitted to the glass! There is a about 2 millimeters/ or 1/16th cut from the outher side so that the metal part does not stick out but lines with the glass.
I have seen several of WMF glass liqueur jugs with metal lids and there are similar techniques used.
Of course this is just my opinion and be wrong.
It is in fact a great unusual piece and I think Paul right about the Art Deco style.
Also I believe there is plenty of salt and vinegar in the pickled cucumbers but they will both not corrode silver while easily do that to alpacca metal.
In fact just googled images of " WMF and Christofle in combination with green glass and there are few pictures that are similar to the nuance of this color but no pickles jar

.
Ok I better stop here - it is just a pickles jar

Excuse my not so good English!
Best !D.