You e got some nice pieces there. The blue striped dynabeat is epic.
I used A4 folios used for jewellery/bracelets they hold 40 in each if you double up and have a box for the cream de la crem
I've one or two electric/dynabeats but not working. I tend to focus on mechanicals
The answer "yes" given above is substantially correct but incomplete and hurried.
For example, on the very popular swapping to a SKX 200m divers, one cannot reuse the original stem/crown combo, so a new one must be bought.
Then, one must reuse the original movement ring, as well the day disc.
But you cannot count on carrying over the date wheel, because that changes across versions.
I wrote about that many times here and on WUS, it should be easy to locate my postings for those that desire to get the full understanding of what and do a perfect job.
That is absolutely normal, Seiko has produce this movement over many decades and in various factories in Asia, variations in finishing and lettering are expected.
The advice to replace with a brand new NH36 was also a good one, then of course anyone does as he pleases.
Not on these Seiko five which are built for simplification and ease of assembly. Just press out and replace with a generic crystal. No point in wasting time chasing original parts that even if found would cost more and be identical.
I believe the crystal comes out with the bezel. When you pop the bezel off, the crystal will still be in it.
Bezel gasket here. And a quick search of ebay shows a couple dozen empty cases for under $15 each.