Help identifying a beer stein (pictures inside)

[Lucas Blake]

I have this old beer stein that I was trying to find some information on, but unfortunately the only identifying pottery mark on it is a curious symbol that I can't track down. Been to a bunch of sites that list makers of steins by their marks but no luck, so I thought I'd try the crowd here. I know the English translation of the German on the side and I believe the "0.51" engraving to be the liters it holds. Not sure what the significance of the "1779" on the tree trunk is. But any info would be very appreciated. Pictures below with close-ups of markings that might aid in identification:

Sides and front view


Pottery mark, "1779" and "0.51" marks, and pewter lid



Thanks again for any help.

 

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