Hey, Ive just recently been given a waterman mechanical silver pencil. My aunty says she's had it 35 years. I was wondering i know this is a forum for pens but does anyone know of any such kind of waterman mechanical pencil around that time. I'm struggling to find out what model this is. For some reason the lead just slides out of the pencil and I would like to know diameter it takes. I'm not entirely sure of the diameter but i think its 0.9mm(This by comparison of lead).

If anyone needs a picture of it id be happy to provide it.

All it says on the side of the pencil is Waterman, Made in France

Thank you in Advance.