Here is a Johnny Ball I found above the Merced River outside of Yosemite National Park. I beleive the wire wrap dates back to the beginning of the century. However, this is not my field. Please write me if you have a correction to what I said or have an interest in buying it. I have cut the wire off another one to see the circled P on the end. Asking $20 + $10.95 shipping. It does have a few nicks, as pitcured.