Belt length is probably 23.6" That is the standard length for those early belt TT's from PIONEER. Does it have the ID Plate on the back? Do you have a Pic you could post? And a pic of the underside. The motor can probably be un-seized with liberal use of either Liquid Wrench or PB BLASTER directly on the shaft and let it seep into the shaft bushing's for a couple days (daily applications with the motor shaft vertical!). After a couple days wrap the shaft with a cloth, and grab it with pliers and try to break it loose. Once it's broke loose, keep adding the penetrant and rotating the shaft until it spins freely without a hard twist of your fingers. The motor should be able to be dis-assembled and the shaft cleaned where the upper and lower bushings contact the shaft. If the bottom bushing has an oil cup, fill it with a light motor oil (sewing machine oil), and soak the upper bushing felt with same. Re-assemble and rotate by hand to make sure the housing is not assembled crooked. It must be straight or the motor will bind.
Actually it's probably closer to the PL-12D than the PL-10. I've never heard of the E1000A/H. And I poured over all the brochures from 1969 thru 1980 looking for anything that would point me to it. This is as close as i could get in 30 minutes.
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After an exhaustive search on Kallhovde.com Pioneer section (
http://www.kallhovde.com/pioneer/Pioneer/Main scan page.html ) I stumbled across Carve it's schematic listing. There among the others was a E-1000A/H "SYSTEM". I then googled "PIONEER STEREO SYSTEM E-1000A/H and came up with a bunch of Ebay manual sales. Active listings are not allowed in the forums so you can click this google link
https://www.google.com/search?q=Pioneer+stereo+system+E-1000A&ie=utf-8&oe=utf-8. These are the only listings I could find. apparently this Turntable is part of a component system. These were popular in Europe at the time and probably still are. I have not seen this system in the PIONEER Yearly Brochures, but from the google pictures I've seen tonight, most of them are from Southeast Asia, and Phillipines. .
I found a picture of a E-1000A receiver being used as a preamp for a Denon AMP. This is a Vietnamese guy's setup.
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Just looking at the PIONEER I would think it's about 10W-15W per channel.
And
NOW you know the REST (or at least MORE ) of the Story!!!