Help with some OTC Badges and buttons

[Sean Allen]

Hi folks
This is my first post so I do hope Im posting this question in the right section, but please let me know if not and Admin delete if not appropriate.
I am not a collector of military items but I am fascinated and interested in it and also social history including world history, but I dont have a military collection as such but I do have a few items.
At the weekend at a carboot here in N.Ireland I purchased a box of badges and buttons relating to OTC etc and I was trying to find out about the history of OTC and I came across this Forum, and also as they were all in the same box, I presume maybe from the same person??, was wondering as a longggggg shot could I maybe locate the person who they belonged to from the pips?
So If anyone could anyone shed light on their history please let me know, I would be very grateful, and I just want to say this website is AMAZING, what a resource.
I have added some photos hope this helps
Thanks
Sean