I purchased it, along with another handful of old maps, at a small town market in the South West of England a couple of months ago and am going to frame it and give it as a present. However it has no date on it. Any clue from its features as to when it depicts? http://i.imgur.com/QO1FOVv.jpg?1
This appears to be an attempt to map out the 12 tribes of Israel. That's what it's depicting, anyways, listing the areas of the 12 tribes and all their names. I can't give you a time range, and I doubt many can, because as far as I know the Old Testament description of this may be difficult to verify or date specifically, but I'm very sure that's what it's depicting!
I googled map of palestine and plan of ancient jerusalem "w & r chambers" and this was the third result.
As the map is published by The Palestine Exploration Fund, they may be able (and interested) in answering your question directly through their site. http://www.pef.org.uk/about/
To add to the answers already given, the smaller map that shows the city of Jerusalem seems to depict it at the eve of the roman conquest under Titus in 70 A.D. that led to the destruction of the temple. The third wall that is shown here was begun by Herod the Great but only completed by the jewish insurgents shortly before the siege.
Interestingly, it seems that the Holy Sepulchre is depicted outside of that third wall. To me this seems to coincide with the location of the so called Garden Tomb which in turn would suggest a protestant background for the production of that map. Most other christian denominations like the Catholics or the Orthodox instead venerate the Church of the Holy Sepulchre as the site of Jesus' burial and resurrection, which is located farther to the south.
