[CR]Can anyone make sense of this Masi stamping

(Example: Production Builders:Cinelli:Laser)

Date: Fri, 14 Sep 2007 11:46:41 -0400
From: "bmaster flex" <breaches@gmail.com>
To: classicrendezvous@bikelist.org
Subject: [CR]Can anyone make sense of this Masi stamping

Hey,

Anyone care to help decipher the BB stamping on my 1973 sammontana Masi? Shell is stamped s58.5s. The seat tube is in fact 58.5. "s" for sammontana? Any old masi builders want to chime in? Some pictures at wool jersey. http://www.wooljersey.com/gallery/bmasterflex/

thank you
Barry Scott
Brooklyn, nY