51 and a half years. I've been lifting heavy for 2 years twice a week. (Running 3 times a week.) 18 months I was working with a PT at a little private gym with no machines. So anything working towards a pull up was body weight.
I now see a PT at a full on gym and use the assisted pull up machine.
I weigh 64 kg. This morning my pull ups were 1 x 12, 55kg then 2 x 12 x 50kg.
I know progress is slow. (Other exercises move a bit faster). But I'm going to be 100 before I can do a full body weight pull up aren't it?!!!