Originally Posted by Ricoh
Assuming you've not yet handed a Pen F at the time of writing, when you do be careful advancing the film as it gets close to the last frame or two as it can be difficult to feel any resistance. If the film is taught, ie it's at the end, and you wind on irrespective not knowing, there's a risk or tearing the sprocket holes. I've done it once, but now I'm very careful and probably err on the safe side by stopping at frame 70, or 71 if I'm feeling lucky.
I second that. I should have replied earlier on but the OG Pen-F with the gothic F can tear your film when you get towards the end of the roll. So when I am getting close to 70, I tend to be extra careful with winding.