A couple of scans off the Fletcher Benjamin book, not much info but at the time, most instructions were kinda brief. One is for Model G, the other for the F which should be similar. HTH
Thanks for the info. I'm honestly not even sure how it's supposed to function. Appears that it's just a simple pressure relief valve attached to the trigger, so no sear or bolt to engage. I've heard of "soaking" old air guns to try and revive whatever's left of the seals. How is this usually done?