Quick update, it seems I re-attached the front element correctly and the camera is focussing correctly. In fact it's functioning perfectly and I already really like it.
When it arrived it had an old metal spool inside so I imagine it hasn't been used in a few decades. It's going to get regular outings from now on.
When it arrived it had an old metal spool inside so I imagine it hasn't been used in a few decades. It's going to get regular outings from now on.