Good classic scope. Unless the reticle is broken leave it alone as 1960s optics are not worth all the cost of an upgrade. If it's broken: Parsons Scope Service but be prepared for a LONG wait. TK Lee dot is also still in business if you want a CH & dot(s) reticle.
I was told that the user could change the crosshairs. Unscrew one set. insert a different set, screw them in. If the factory recently shut down, are there any suppliers out there that bought up the remaining invntory?? I need turret caps for it too.
You have been misinformed. The caps will be like finding an honest politician.
I'd give Parson's a call and see if they can help. What you probably have is a parts scope for some Pecar collector.