Thanks, everyone. I picked a good evening to run out the door before sunset.
Though the Yashica 635 is a dual format camera (120 and 35), I don't have the conversion kit for it, Ron. I changed out the pins in the filter mounts when I rebuilt it so I could mount any brand filter in it, but then either I didn't check the batch I put in the kit, or one of them fit and I assumed they all did. So these were all unfiltered. I also had no meter with me, Bob, but usually shot for the sky, and then fixed the shadow detail in post.
Yesterday I picked up two Gossen meters, a Pilot 2, and a Luna Pro F ($8 and $10 respectively). The 2 is a selenium, while the F takes a 9v cell, and the 2 reads within a half stop of the F, both accurate with my test light. So I'll be packing one or the other from now on.