Featured Two Glass necklaces

I've had a day off so took some pics and would like to post tonight.
I hope I don't fill the board too much but it isn't often I get the chance.
First are two necklaces I think the first is Czechoslovakia but not sure. Would it be worth restringing and if so what should I use for thread?
The second I have no idea strung on wire.
No idea how old Thank you

 

The first could be Czech. Could also be German.
If you are keeping then worth restringing. Have you restrung before? You might get more if they are restrung. Not sure it would be enough for the time spent, unless you just like doing it.

The second are older. Might be from India. Just guessing as I have some strung on wire and was told that is where they originated from.

 

Czech and probably Japanese - the green one is probably from Japan. The Czech one is probably early 60s. They used that clear filament and over the years it tends to shrink until... beads all over the floor. I'd probably restring on tigertail if you plan to keep it.

 

Thank you both! I have never restrung but like to give it a good. What is tiger tail
That is quite exciting if they are from japan had never considered that

 

I'd not restring the chain one, but I'd give it a good vinegar bath.

 

Tiger tail is a plastic-coated multi-strand wire used for beading. It also requires crimps to finish it off and make sure it doesn't come apart at the seams. The ends can be sharp, so they have to be covered. It's a bit of a pain, but on the other hand glass beads don't cut it like they can woven cords. It requires tools like wire cutters, pliers etc. Beading cord is easier for someone who's never done it and requires fewer tools; you can get pre-threaded needles and all you need are a sharp scissor and some glue for the knots.