Thread: age of heljestrand pins and a possible celluloid rot

Hi
I got some heljestrand razors and some of them got washers on the pins and some dont. My thought was that the ones without washers was older and the newer got washers.
Is this how it is and if thats the way, when did they start to use washers? I post a picture with the different pins.
I also got another question, do you guys think the mk30 on the pictures got celluloid rot? should I remove the blade and discard the scales?
Thank you for your answers