Maker of Frosted EK2

[Stepdale]

Hello,
I recently acquired this excellent cross from another member. It almost looks like it might have a maker's mark on the ring, possibly Wachtler & Lange, but it's so faint that I can't get a photo of it and it might just be a figment of my imagination. Can anybody determine the maker and tell me if it comes in both marked and unmarked versions?
Thank you,
Dale

[Douglas 5]

W&L is the maker and found marked and unmarked .

Douglas

[Douglas 5]

The 100 mark is often a shallow strike and hard to see at times .
The frosting covers the 100 often and goes undetected .

Douglas

[Stepdale]

Thanks, Douglas. When I looked with a loupe, I could make out what I thought was a 1 but the other numbers were so faint I couldn't be sure. And you're correct, they are covered with frosting so I guess that makes them even harder to see.
Dale