I found this via a couple of Turkish posters on Facebook. Mr Tambourine Man's original tambourine, which is nothing like I would have imagined:

picture on Facebook

It's a variant of the Turkish/Kurdish/Iranian "daf" or "def". Langhorne's has little bells inside the rim; it's more common to have a few rows of metal rings inside linked like chain mail which rattle against the head. As he says in the quote, it makes a range of sounds comparable to a complete drumkit:

The tambourine that I used was really cool, because it had a bass tone, and it had an edge tone, and it had jingle tones. So it could pretty much do what a drum set with a bass drum and a snare drum and a hi-hat would do. Because it would keep all of those, it would have something to say in all of those registers. So I think that Dick was interested in working with me on that, because it was a unique sound, and it complimented the unique sound of his dulcimer.

I can't locate the same image elsewhere but there must be a non-FB source for it.