This looks to be a fairly nice original Model 100 chambered in 284 win.

Production of the Model 100 began in 1961 with 1963 being the first year the Model 100 was offered in 284 win. 

The serial numbers are 64498 so you can verify that yourself.

Production stopped in 1975.

There was a recall on firing pin issues back in the 90s on the model 100.

We have not been able to check if this rifle was sent back or not for warranty work, this should be done before firing the rifle.