It's an early version indeed, appears to have the serial number cast in like a Contra, as apposed to stamped on a machined pad like later saws.
The full wrap handle with the curved brace is also correct for the early 090. Could you post a pic of the logo on the starter?....The embossed log logo would be correct for this saw.
Interesting to see it's wearing a so called jungle muffler.
Nice score!