Master_Slater
New member
This might have been discussed here before but I cannot find any solid evidence. This mostly pertains to the older heads, in particular, the blueface heads. The older style serial #s usually had the year/production number. What I want to know is if the mono and stereo heads had SEQUENTIAL serial #s meaning #29 could be a stereo and #30 a mono. Or were they separate. Thanks for any help regarding this matter!