Help Identifying Mauser Rifle

[TRAP55]

Cigarette rifle was my first thought too, but too many things seem to contradict that. Receiver ring stippling, and being completely wiped of any markings says Cigarette rifle.
Octagon barrel w/express rib in 7x57, the work on the bolt handle, and fine engraving on stock screws and sling mounts, says pre-war Guild gun. A Guild rifle would have had the different makers marks all over it, especially the barrel. The dbl set trigger looks to be a pre-WWII DWM trigger assembly with the long spring.
The raised flat on the side of the stock just behind the bolt handle, is the remains of an oblong panel that would have extended forward to the receiver ring. It would have been full length with an engraved muzzle cap too. Looks to be cut off right about duffle bag length.
My best guess, is this rifle has 3 history's. A WWI Infantry rifle, a post WWI Guild Rifle, and then a post WWII re-finish/rework into a Cigarette rifle.
Thanatos, especially coming from your grandfather, it would be well worth it to have the stock repaired, and restore that rifle. JMO

[TRAP55]

Kind of resembles a US flaming bomb stamp (upside down) ?

It does, but it isn't, and It's driving me nuts trying to remember where I've seen it. I keep thinking Poland, but I know that isn't it either! Maybe in a month at 4am, if it's still alive, that brain cell will fire up.

[SVT-40]

Since it bears no official German "proofs" it must have been made by a non govt. approved smith. Not real uncommon for these sporters made by many for sale to GI's and others from surplus parts.

[Thanatos2203]

Thank you guys for all the help, and please keep your thoughts and ideas coming!

As far as stock restoration goes, any recommendations for people who do good work? I am in Simi Valley but could travel.

[onelonehorseman]

It's a nice looking rifle OP.