Barrel manufacturer identification

[ostrobothnian]

Gentlemen. Does anyone know the manufacturer of this barrel based on the rollmark in the photo? Is it a decent barrel? It is an 11.5 w/5.5 in. FH.

Thanks in advance for any input.

http://i87.photobucket.com/albums/k152/finlandssvensk/rollmark002.jpg

[Robb Jensen]

No idea, but new S&W M&P15 barrels are similarly marked.