Nice kit with potential.
Based on the pictures, it looks like the following:
Tom Tom - 8x12
Floor Tom - 16x16
Bass Drum - 17x20 (actually 14x20 shell)
The 1965 catalog shows the same style of floor tom leg mounts and the 1968 catalog shows the same style of bass drum L-rods (T-rods). I'm guessing the kit is closer to 1968.
The bass drum has a Rogers Swivomatic tom tom mount, which is not uncommon and might have even been dealer installed. The wrap has been removed from all of the shells too. If it was originally covered in a Duroplastic (Premier's name), it's possible the wrap was cracked. It also looks like the tom tom and floor tom still have the cast hoops and slotted tension rods.
Not sure on the exact value, but in it's current dust covered, long term storage with a foam cooler of parts condition, I would say $150 - $200? That's if everything is still with the drums, the chrome is in good shape (Premier usually is) and there are no extra hole or shell damage. It's a good candidate for a re-wrap too. Aquamarine would look really sharp.
Keep us updated. I'm guessing you're "interested"? ;)
-Tim