Early A wagon side glass gaskets?

I would say you can remove these without cutting. If it has a lock strip-- you should be able to remove.
#1 make sure it's hot/sunshine.
#2 remove said lock strip
#3 use wedges made of plastic or wood (like shims from home depot)
slowly seperate the glass from the rubber(might have to cut some sealant)-- once you have a corner it will come out quickly
use the shims to hold it & roll the rubber lip- presto out it comes.
Getting it back in -- I cannot help-- never tried, Lawrence