I live in Hastings, England, in the Old Town. Our house was built around 1525 and is wood beamed. It's pretty solid. However, it's an interesting subject here. Paintings made on wood panels have survived for hundreds of years. But there are so many variables, prediction is difficult. In terms of a good playfield, kept in reasonable conditions, I would say playable for 200 years. Because of the nature of the components, it would be possible for an em machine discovered after say 1000 years and 'reverse engineered' to be a guide for making all the (rusty) coils, switches, etc etc new from scratch, paint a new playfield using the old one as a guide, ditto backglass, new cabinet (easy peasy), all this probably not a problem for the people of 3016. So a playable replica possible, based on the ancient machine - and that original machine would have significant value as the "model" on which the playable replica/s would be based (and would look good in a museum). Later machines with digital components? Likely the people of 3016 will be sufficiently advanced to sort those out too. Let's hope Pinside is still going to help them with any problems. Otherwise they'll have to phone Steve......