Who made this rifle..?

[Al Flipo]

I wonder who made this rifle, the top of the barrel is marked "Otto Winter Bunziat" the last part is hard to read.
I need to make a new bolt handle and I am wondering if it had a straight or bend bolt handle.

 

[Brutus]

To my eye resembles Belgian Warrant rifle in Flobert possible calibers: .22 rimfire or 9mm Flobert and such weaker powered rimfires. But usually they have an external cocking hammer?

My two bits only.

Edit: What is the caliber?

 

[track]

I would guess European, probably German or Austrian (Otto). If the rifle was dismantled, there would be proof-marks on the barrel and/or receiver.

 

[tiriaq]

The action looks like the Mauser 71 styled actions used on some target and hunting rifles. I would suspect the handle was straight, but it could have been turned or even turned and flattened.
Is the trigger mechanism missing its rear cocking trigger?

 

[Al Flipo]

The rifling is almost straight, and the bore is about .355"

 

[Brutus]

Folks could it be that early Russian Berdan action? Pre Moison Nagant??
Sure looks similar.

 

[tiriaq]

No, not a Berdan.

Was the bolt handle originally dovetailed in? Or was that a period repair? If the handle was mechanically attached, that would facilitate installing a replacement.

 

[Al Flipo]

It looks like a casting, the handle was part of the bolt before someone broke it off.
I drilled and threaded it for 1/4-20 and made a pocket to fit the straight bolt handle.
I am making up a 5/8" ball on a 3/8" straight post, about 1.250" long, that should do it, and Loctite it in.
As long as it looks somewhat presentable.

 

[tiriaq]

With the socket and the thread, it should hold.