[David]

Restored a 38-15 app 10 years ago rewinding the coil is something you can do. Count number of turns before removing  each winding and note direction of rotation of each remember the direction of rotation is the way it will be installed not removed do not ask me why I know this is so important! Wire size important, some sets of this time frame had sulfur in the wax to make the wax softer does not play well with copper over the years. Just get some bees wax and good luck.