Mac 325?

[jonsered-52E]

Just picked up this saw at a yard sale and wanted to learn more about it. It looks like an early 50s saw, not sure on how many cc's it is. Is this a value able saw? how many were made and what's the years they were made. in one of the pic there's two push knobs/buttons one says chain oiler (the closest one to the handle) not sure the other one. Where do I put the bar n chain oil? Does it go in the front where the black cap is? How does the clutch work being part of the recoil. Any help is appreciated.
Edward

 

[Yukon Stihl]

If you had the early model with the gas shut off next to the oiler button...
Then it would be the rarer one.Making it worth more than the one you have.
Still a cool old big saw

 

[heimannm]

The 3-25 was McCulloch's first one man saw and the first saw with an all position carburetor. As Yukon has noted, the early 3 button models are more sought after and so more desirable/valuable. If eBay is an indicator, they rarely fetch over $100.

Mark

 

[jonsered-52E]

I was scammed hard then. Now I regret this purchase. The saw has a oiler button but it also has a second push button, is it an primer?
Thanks for the INFO