I have a nice mini one
... As far as i know/have been told...... They were made in the late 80s before Ahead sets and stems were established in just a few limited pieces in Pro and mini. Jim Melton told me that he remembered Walt Ehnat(ESP)developed these stems in the late 80s. He thinks they were based in Washington. The guy i got it from said it was developed by ESP to save weight and that the later Ahead sets and stems were a direct result of ESPs work as ESP stopped trading. I cannot find any info after 1989 about ESP stems or the company. Maybe someone on here has more info....i tried asking in the states but just got blanked. I have not seen these stems in any magazine advertisements.
Its definately an ESP Flying W Stem.. All i can tell you for sure is that it is one of the last pieces ESP made.
Is it a Pro size?
Heres the one i have
I am still trying to trace the original owner... i took it in trade for some Bottema forks about 16 months ago...The guy was Chris Kealey from Hawaii. When i got the stem and it turned out to be a mini i decided i didnt want to trade and emailed him back for his address. He has never replied
So i am babysitting it