I have a ladies, apparently a very good auto movement from the 70s which belonged to my mom. It has a nice golden dial (not like the yellow pic). I am thinking to have it serviced and buff it and give it to my mom or to my daughter. I will not do that unless I solve the crystal issue. BTW watch works but clearly was not serviced in many years.
It has a 9 facet crystal which is scratched, especially due to scraping at the angles between the facets.
I'm not too sure that the facet concept was a good engineering idea on behalf of Seiko due to this sensitivity.
So, I am looking to fix or most probably change the crystal. Almost 100% sure it is glass, tapped it with a metal screwdriver and heard the glass sound.
Anyone know: would it be possible to change the crystal and is it possible and feasible to re polish the crystal?
Honestly I don't like the crystal to start with, not sure if it has a tension ring in there which I in my humble understanding makes replacing trickier.
I Google but couldn't find any reference to the model case 0248 (although did find a watchmaker's technical guide PDF for 2706)
Your thoughts and ideas?