Identify this rifle

[Smellydog]

A double set trigger has its own little flying hammer.
A single trigger acts directly on the hammer of a hammer gun or the cocking piece of a bolt action in that the weight of the firing mechanism is upon the the sears.

A double set you are setting a smaller lighter mechanism that when tripped releases a lighter part to act on the heavier firing mechanism, its momentum doing the work.

Ive never liked them, often the trigger finger has to reach to far forward.

Some designs like BSA were better in that you pushed the front blade forward and the normal position rear became the lighter set trigger.

All a waste of time because a decent single stage or two stage trigger can be as good.

 

[Reddish]

We have a somewhat similar looking rifle in the gunroom at work........can't seem to find any mention of caliber on it but we have decided it's probably in 9x57 caliber....

 

[Edinburgh Rifles]

9x57 mauser
Built on military mauser action

Lots of continental makers producing take down sporting variations of the classic M98

 

[phillc]

Mauser Type K Sporter in 9x57.

Something similar to this.

"Mauser Light Short Rifle Type “K” chambered in 9mmx57 Mauser Caliber Made for the German African Colonies Approximately 1912, manufactured for and sold by J.A. Frank of Stettin, Poland, outfitters for German Colonials."