Meinl woodcraft made from german oak! When ended?

Hi everyone!
I have a problem with find some info about meinl's woodcraft congas made in Germany - these made from German oak. I know that meinl factory was moved to thailand in 1978, but why woodcrafts were still made in Germany and sold like a superior drums? When meinl started produce this series and when it ended? I heard that meinl reintroduced woodcraft series in 1998 but they probably was still made from german wood - so when they started woodcrafts made from ash in thailand? Does anyone has informations about that? Am asking becouse maybe I will have an oportunity to buy an old school woodcraft conga probably 15 - 20 years old. I don't know how to check it out is that really German superior woodcraft!
I have a problem with find some info about meinl's woodcraft congas made in Germany - these made from German oak. I know that meinl factory was moved to thailand in 1978, but why woodcrafts were still made in Germany and sold like a superior drums? When meinl started produce this series and when it ended? I heard that meinl reintroduced woodcraft series in 1998 but they probably was still made from german wood - so when they started woodcrafts made from ash in thailand? Does anyone has informations about that? Am asking becouse maybe I will have an oportunity to buy an old school woodcraft conga probably 15 - 20 years old. I don't know how to check it out is that really German superior woodcraft!