No. They were until about 5 years ago, but the pedals were last made more than 20 years ago so you can see why nobody stocks them any more. The same Greek site which has the NOS 525s has SM-SH70 cleats.
Are you able to use sm sh51 cleats with them? I've got a set of those pedals and my mtb shoes seem to clip in but I've not actually ridden on them to know if it'll be successful
I have SH51 on my MTB shoes, IIRC they clip in but there's something odd about the release, it's so long ago that I can't remember whether its too hard or too easy. When you look at the two cleats side by side, there are significant differences even disregarding the pontoons on the road cleats.
Based on a quick static test, I'd say the PD-7410/SM-SH51 is usable but not as nice as the proper cleats. I think I might have some non-float SH50 cleats mounted to some shoes somewhere, so I may give those a go and see if they're better.
No. They were until about 5 years ago, but the pedals were last made more than 20 years ago so you can see why nobody stocks them any more. The same Greek site which has the NOS 525s has SM-SH70 cleats.