Signals curved shoulder titles

[Drummajor]

Hello Members, can anybody help me identify these shoulder titles?
I am almost certain that the top one is Indian Signals, the next one down is unknown to me, and the bottom pair of R.Signals has me stumped completely. I cannot find any reference to curved ones.

Regards Phil.
Merry Christmas to all.

[Lancer 17]

Hi Phil

Sorry I cant help but Happy Christmas mate.

Regards

Phil.

[Drummajor]

Thanks Phil, same to you cobber.
Phil.