How to identify antennas?

[izeman]

If they are not having any markings it would be difficult and you should go for any test equipment to know the frequency of antennas.

Thanks. Yes, they do have markings (double rings), but ALL of them have them. Seems they use the same plastic cover for all kinds of antennas.
I now just test each of them and see which one gives the best connection for the used hardware.