I'll look a bit closer but the action type is Kerner-Anson, per the screw at the top & bottom of the back of the frame. Just wild conjecture on my part, but the Kalibre .... & Sl lead me to believe it had origins @ one of the Merkel facilites. Eduard did little stamping if any. All the effort was applied in Suhl, possibly at a Merkel concern thru their sub-contractors.

Kind Regards,

Raimey
rse