via this eBay listing
"Up for auction/sale is a highly collectible, stunningly preserved 1974 Vintage Moog Minimoog Model D (Serial Number 4019). Manufactured during the coveted "Golden Era" at the Williamsville, NY factory, this iconic instrument is 100% vintage and features its highly desirable, rare original smooth factory wheels—proving it has skipped the typical late-70s retrofits and repair-shop modifications.
For the serious collector or professional musician, Serial #4019 represents the ultimate holy grail of analog synthesis, boasting the raw, heavy, authentic sound that defined 1970s music history.
Why Serial #4019 is Highly Collectible
Smooth Wheels: Features the original flat, smooth-edged cream wheels used briefly from 1974 to 1975 before Moog switched to ribbed wheels.
Revision 2 Oscillator Board: Contains the legendary early-70s oscillator design prized for its raw, organic, and beautifully thick analog drift (pre-dating the cleaner, highly stabilized later models).
Discrete Moog 4012 Filter: Equipped with the legendary hand-matched transistor ladder filter for that creamy, earth-shaking low end."
I was curious about the wheel history. According to AI: 1971 to Mid-1972: Early units used clear wheels.
Mid-1972 to Early 1973: Used "blocky" white wheels.
1973 to 1974: Smooth, solid white (or cream) wheels became the standard.
Late 1974 onward: Replaced by the more common grooved or ribbed "Oreo" wheels, which were also carried over to later [Minimoog Model D] reissues.
If anyone knows otherwise feel free to comment.
