Rare 1974 Roland SH-3 Synthesizer SN 240400

via this auction

Note this is not the the more common SH-3A model. Surprisingly a few have come up in the past.

Update: see this post regarding the Moog filter. Apparently the SH-3 does not have a Moog filter as stated below.

"Vintage 1974 Roland SH-3 Synthesizer - one of less than 50 [see update below] made. First model. (Lawsuit model)...

The following is a blurb I found at the wikidot forums (wikipedia):

The Roland SH3 was produced in 1974. It is more rare than the SH3A which was put into the market after Moog sued Roland for the original SH3's filter design. It is believed that less than 100 of these were ever made. The replacement SH-3a is a monophonic analog synthesizer manufactured by Roland from 1974 to 1981. It is unique in that it is capable of both subtractive synthesis and additive synthesis. Two LFOs and a unique S&H section provided capabilities not found in contemporary self-contained synthesizers of the time. The rhythmic pulsing in the Blondie song "Heart of Glass" is an example of its sound." SH-3 vs. SH-3A

Updates via otto in the comments:
"info on SH-3: here"

"There were probably closer to 700+ of these made. The less than 50 seems to be a myth spawned from a sound on sound article. Still not all that common."