Here's some unsolicited clarification for five Masi owners listed on CR's Masi Timeline:
John Jorgensen's M55-7020, estimated to be made in 1986 was made by me in 1987.
Kevin Kruger's M58-4025 estimated to be made in 1983 by Dave Tesch was made in 1984 by Rob Roberson.
Jolie Ramage's M57-4191 estimated to be made by Dave Tesch was made by me in 1984.
Pat Moffat's SMC62-C835 estimated to be made in 1988 surely was made in 1983, eh?! I was in my prime at Masi by 1988, and never stamped any letter other than an "M" in a bottom bracket in 1988 or in any bottom bracket in the thousand or so frames I made between January of 1984 and June of 1990.
Jack Gabus's M56-S4216 GC estimated to be made in Carlsbad in 1994 is a mystery to me. Carlsbad in 1994? Maybe the "S" denotes "serial number. Less the "S" it would have been made by me in 1984. By 1994 I was making frames for Bill Holland, and I don't even think any GCs were made in the U.S. during that year. Maybe it's a '94 Mondonico or Billato made frame. I wonder if Jack has pics of it. Maybe I slipped an "S" on it to get a rise out of the guy signing my paychecks. Joe Starck, Madison, Wisconsin