Thanks Simon,
I suspected the Fresnel was from a GE signal. I have seen photos of them in Australia, but they seem to have been pretty rare here in Victoria. Never seen photos of them here, but I have had a signal from the 60s or 70s described to me at a location that I recall seeing very old signals at, as a child. So there was at least one set in this state. I'm aware of them being used in Tasmania and South Australia. In fact some are still in use in SA, albeit as alternating flashing lights (wig-wags) at school crossings.
I've also seen these same lenses in use in Parco pedestrian wig-wag lanterns. ie.
Regarding those non-beaded lenses, although I can see that the green one could easily have the rear blacked out with paint around the walking man symbol, I'd still expect to see some sort of beading or diffuser. Hmmm! And thinking about that I've remembered that I have a ped signal which actually has small diffuser panels directly behind the red and green man symbols - even though the lenses are beaded. Perhaps there was a stage of development of these lanterns that I hadn't previously noticed. The red lens may have had masking behind it, as it normal with incandescent and halogen installations.
I really suspect that these lenses were part of some samples and trials to determine which type of lens and / or masking was going to be selected as the standard when it was decided to phase out text indications.
