Nice map! Couple suggestions though. I think the crumbly parchment look, seems too old for a 1930's map. I'd go with a cream colored or tan colored paper with a few folds, or no folds. Make it a bit "dirty" and abused. But don't go for the ancient map look, it doesn't look right to me. Otherwise good job, just my opinion.

Also through in some meridians, longitude, latitude, compass rose to dress it up a bit more. That would really make this map shine.

GP