have no idea what this is other than a mauser design, help?

[ohiocopper12]

friends husband had died.  she inquired if i wish to buy this gun. can't give her a price as I have no idea what or who made it.  mauser by design and its aftermarket sporter.  There is no brand nor caliber size.  he had lots of .270 winchester and she thought it went to this gun.  serial number 6099 is stamped on bore, magazine, bolt, and screws.  thanks for looking.

[Sarge]

The rifle is a sporterized WW 1 Gew 98.  It could be in any caliber, but since he has lots of 270 that is "probably" it.  Try putting one rd in the muzzle bullet down, if it goes in to the shoulder it is a larger caliber.  If it stops before it gets to the shell case it is probably 270.  Then try loading one of the 270s and see if it will chamber - do this with the safety in the verticle position. 
BUT to be absulutelty sure you should take it to a gunsmith and have him verifly the caliber. 
Sarge

[ohiocopper12]

thank you very much! where would i go to print documentation if someone were to ask?  approx value?

[Sarge]

WHAT documentation???  You have what is most likely a vet bring back from WW 1 that was later sporterized. 
Value will depend on it's condition and the quality of the work done on it.  It will also be determined by what the going price is for a butchered war trophy in your area. 
Sarge 
 

[Trap4570]

As mentioned earlier - it is probably a .270 but if you feel uncomfortable about checking it yourself then take it to a gunsmith to have it checked.