It's a Mordex "Major"
I've had a similar one for about 50 years.
£ 45 ....
Go for it. They are nice general purpose centre pins.
I think it is a mid series model. The early ones had a rim mounted check lever and the later ones had trilobe handles.
The reel in question is a "Mentor". Not as I said last night, a "Major"....
Just checked the ventilation holes on my Mordex reels.
All other comments still apply ( I think).