Could it be a commercial 1903 rotary/magazine?
I do remember when working on it that there was no ser# on the magazine itself which I thought kind of odd if it was a Military part.
I've never had a Greek M1903, but I have a couple of commercial Steyr 1903 carbines, same for 1908's and a couple 1910's.
I'll sort through the stuff and pull it back out and take a look at it again. Take some pics.
It needs to be shot again too!

Yes it was $250. and it was only 4 or 5yrs ago.
I could not believe no one else had scooped it up.
The person selling it immedietely said to me when when I asked to look at it.."Do you realize what
caliber that is?"

I shrugged and said " 6.5 M/S ? I'd guess.."
He then pointed out the Gibbs caliber marking on the top.
I wasn't entirely familiar with that at the time, but I certainly wasn't going to let that beauty slip away! Perfect bore and all.
The stock shows hunting and carry use, but so do I.

He said several people looked at it but put it right back down when he explained it wasn't in 6.5M/S caliber.
Thank God for that.