Just got one to complete. 15A TE-ON Feel the answer must be tenon - chippy's product = tenon (joint). However if large number = TON, how Is EN explained? I have been puzzling over this one for days now.
Thanks to you both. I considered TEN but didn't think it a 'large number'; preferring TON which can mean 100.
Anyway I will be able to get to sleep tonight.