If somebody @CI904 (?) has contacted Richard Sachs and gotten verification, maybe he'd also determine approx. age with that 2825 serial number. But I believe it's very young, based on the "RS" that I think predates this early "Touring" example
h**ps://bikeville.com/2011/08/16/customers-bike-1979-richard-sachs-touring-bike/
There's this link to some more sharing between C&V members who have RS frames, but many of the pix were erased (no)thanks to Photobucket
h**ps://www.bikeforums.net/classic-vintage/1097325-early-richard-sachs-2.html
and sorry for the edits to the links but BF doesn't allow hot-linking I guess, even to the BF site
Also seems he didn't always panto the forkcrowns, there are several Touring examples with blank top crowns.