The Silver-Seiko built Royals from the Early 1970’s munk December 23, 2014 From the Desk of Reverend Munk, The Typewriter Database, Typewriters In The Corral 4 Comments 1970 Royal Sprite Royal Apollo 10 Electric. Not that much bigger and heavier than a Brother JP-1. Silent as a mouse in operation. No motor noise at all. Top 20 most popular models are now listed in the Typewriter Database. The runaway favorite in terms of number uploaded? The Royal Quiet De Luxe.