Help with Philbrook identifying mark?

[manuelschafer]

Hi there,
So pretty.... QUESTION: did he make the very first of seatbinder integraded fastback seatstays as shown in below picture(s) ?
As History has it Tom R. took this aesthetic detail to early mountainbikes within his young age passion of road racing and framebuilding just like Bill/Phil
Thank you everyone and pls accept a detail shot of a Potts (former student of T. Ritchey) who took on the concept aswell.
My intention is the understand better who else perhaps came with such mechanical detail solution originally, if there is a story to tell..

 

[manuelschafer]

Just as appreciation for this fine craftsmans legacy anyway (hence these stunning pics) and anyhow (hoping someone can elude a bit on this slightly off/on topic inquiry )


Perhaps as in the pic with the red frame where his son took the photo back then...
Here the transport gets organised ..

ps
depending on framesize, if someone wants to relocate a brazed lugless frame without fork i would take a medium sized one (that is to say 54 or 56)