I bought a like new Model M rubber dome 71xxxx the other day at a thrift store for $13 (I guess they knew it was special) and I just wanted the keys.
Case and barrel plate would have been a bonus.
Then I discovered that the keys are different because the center of the stem needs to be filled to push down the dome. Duh.
I was pretty excited to get a set of 1-piece keys, because I want to mod my Greenock 42H for the lightest, quietest possible buckling spring.
So how do I tell what the spacebar is made of? I have a half-dozen in a box, and all I see are marks such as A6 or B8. And one has just the numeral 1 and nothing else.
As I understand it, PBT is preferable. And it has to be PBT to be dyed, is that right?
Thanks