RCAF 601 Squadron?? Air direction?

[Sock Monkey VC]

OK, here's another patch I have to ID before flogging it if you're able to help. It's a tall jacket crests and seems to refer to 601 SQN, the RAF mob but I can't decode it. Is that an Air Direction reference at the top? Tel for telecommunications, telephony?? Would the chain links refer to a radio chain? This one's really got me stumped. It appears to be of 1950's vintage, perhaps a bit later.

Thanks for any assistance.

Monkey