[Ron Ramirez]

How can I tell? Without seeing the back of the set and seeing how many tubes there are - 6 (65), 7 (76), 8 (87), or 9 (95) - there is no way to know unless you ask. And then most folks, not being knowledgeable of vintage tube radios, may well count coil shields as "tubes" and get the count all wrong. Only photos will tell the story. Period.

edit: Hold the phone. Looking at your link, the set does not have a small off-on switch directly below the tuning knob, nor is there a hole for same. That makes it an early 65. The 87, 76 and 95 all have four knobs as does the later 65.