Paid $169.03 total including shipping Feb. 2024 The discs are translucent. If you hold them up to the light, you can see through them. Robin Hood is labeled as Disc #10020 Engraved on both sides, of both discs, it reads: Robin Hood - Color - Side (1-4 depending on disc and side) - RCA and Selectavision are Tradmarks of RCA Corp. Made in USA. 10020 Disc 1, side 1, holds a sticker, reading: 16-85 2151 F Disc 1, side 2, holds a sticker reading: 16-85 2151 B Disc 2, side 3, holds a sticker reading: 17-18 1151 F Disc 2, side 4, holds a sticker reading: 17-18 1151 B Note: The plastic center insert, of the plastic tray reading "Remove and Discard" was missing. I took it from my other prototype disc "Gene Littler" to make this, higher priced set, more complete, than when I purchased it. Robin Hood & Gene Littler were both purchased by the same seller of California, at the same time, in different ebay auction listings. The seller informed me, he purchased them in the SF east bay area, at an estate sale. A year after buying two of these, he listed King Solomon’s Mines. After buying it, I asked if he had more and offered him a price to buy them all and he agreed. It would be then, that I would learn they originally belonged to a late RCA engineer; Bob Moore. "The first CED prototype discs were multi-layered, consisting of a vinyl substrate, nickel conductive layer, glow-discharge insulating layer and silicone lubricant top layer. Failure to fully solve the stylus/disc wear and manufacturing complexity forced RCA to seek simpler construction of the disc. The final disc was crafted using PVC blended with carbon to make the disc conductive. To preserve stylus and groove life, a thin layer of silicone was applied to the disc as a lubricant. CED videodiscs were originally conceived as being housed in jackets and handled by hand similar to LP records, but during testing it was shown that exposure to dust caused skipped grooves. If dust was allowed to settle on the discs, the dust would absorb moisture from the air and cement the dust particle to the disc surface, causing the stylus to jump back in a locked groove situation. Thus, an idea was developed in which the disc would be stored and handled in a plastic caddy from which the CED would be extracted by the player so that exposure to dust would be minimized." https://en.wikipedia.org/wiki/Capacitance_Electronic_Disc Wikis source link: http://cedmagic.com/history/ced-1977-vs-1982.html
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0. RCA Selectavision Videodisc Prototype - Robin Hood - a. Front cover

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Paid $169.03 total including shipping Feb. 2024

The discs are translucent. If you hold them up to the light, you can see through them. Robin Hood is labeled as Disc #10020

Engraved on both sides, of both discs, it reads:
Robin Hood - Color - Side (1-4 depending on disc and side) - RCA and Selectavision are Tradmarks of RCA Corp. Made in USA. 10020

Disc 1, side 1, holds a sticker, reading:
16-85
2151
F
Disc 1, side 2, holds a sticker reading:
16-85
2151
B
Disc 2, side 3, holds a sticker reading:
17-18
1151
F
Disc 2, side 4, holds a sticker reading:
17-18
1151
B

Note: The plastic center insert, of the plastic tray reading "Remove and Discard" was missing. I took it from my other prototype disc "Gene Littler" to make this, higher priced set, more complete, than when I purchased it.

Robin Hood & Gene Littler were both purchased by the same seller of California, at the same time, in different ebay auction listings.
The seller informed me, he purchased them in the SF east bay area, at an estate sale.
A year after buying two of these, he listed King Solomon’s Mines. After buying it, I asked if he had more and offered him a price to buy them all and he agreed.
It would be then, that I would learn they originally belonged to a late RCA engineer; Bob Moore.

"The first CED prototype discs were multi-layered, consisting of a vinyl substrate, nickel conductive layer, glow-discharge insulating layer and silicone lubricant top layer. Failure to fully solve the stylus/disc wear and manufacturing complexity forced RCA to seek simpler construction of the disc. The final disc was crafted using PVC blended with carbon to make the disc conductive. To preserve stylus and groove life, a thin layer of silicone was applied to the disc as a lubricant.

CED videodiscs were originally conceived as being housed in jackets and handled by hand similar to LP records, but during testing it was shown that exposure to dust caused skipped grooves. If dust was allowed to settle on the discs, the dust would absorb moisture from the air and cement the dust particle to the disc surface, causing the stylus to jump back in a locked groove situation. Thus, an idea was developed in which the disc would be stored and handled in a plastic caddy from which the CED would be extracted by the player so that exposure to dust would be minimized."

https://en.wikipedia.org/wiki/Capacitance_Electronic_Disc

Wikis source link:

http://cedmagic.com/history/ced-1977-vs-1982.html

Note: This content is private but anyone with the link will be able to see it.