Mount pointer?

I shoot with a SMC Pentax FA 43mm limited prime lens. My 31 and 77 mm lens do have a green mount pointer, but my 43mm doesn't. But I see there are also 43mm lenses that do have one. What is the difference between those two SMC FA 43mm limiteds?

Thank you for your quick and clear response, LennyBloke. I had already expected that the eldest princess was the only one who didn't have a mount pointer yet. Glad you confirmed my suspicion. Mount pointer or not: After about twenty years I still love my three silver princesses. Both on APS-C and on full frame. And after comparing the SMCs with the HDs there no reason (yet) for me to exchange the SMCs for the HDs. Yes, the HDs are specially developed for the digital era, but the SMCs still stand strong to my opinion. Both on film as digital.

When the K-mount came on in the late seventies, all K mount lenses had a raised dot to facilitate alignment when installiing the lenses on the camera. In my opinion, they should have left it on. It differentiated the lenses from other manufacturers mounts and made it easier to mount in dark environment.

Indeed. One could do it without looking, just by aligning the bump with the lens release lever.