TR-period EK? Which maker?

[Borzadow]

Hi!
I think that is TR-period made - am I right?

[Borzadow]

reverse

[Borzadow]

also - can you recognize this maker mark?

[saschaw]

I think it's WW1 era, rather early than late. The core seems to be a cast one.

The mark might be "Fr." but I can be wrong.

[streptile]

I think it's WW1 era, rather early than late. The core seems to be a cast one.

Agreed.

[Borzadow]

Thanks guys!
I see that I must learn a bit of that for future...

Can you show me any TR made EKII for example?
I remeber that the best way to recognize it is a wider frame, right?