Odd and massive m42

I know that Sigma made at least two versions of this lens -- supposedly one Scalematic, the other not, but mine is a Scalematic, but slightly different than yours. Mine is also a YS mount and a 77mm filter thread, and has the Scalematic "rulers". But on mine, AT MAJOR MARKS, the VERTICAL scale is in RED, and the HORIZONTAL scale is in GOLD. Also, mine lacks the green and red lines on the barrel. And interestingly, it lacks the DOF scale. The serial number has the SIGMA mark and 700447 -- two digits shorter.
Which came first, the chicken or the egg?