This one came on the market in August 2016 with an asking price of $1,900. Looks like the nut has been converted to brass, but seems intact otherwise. The case is a must!
"Dan Armstrong Vintage Ampeg Bass 4 String 1969/1970 era, serial # D1103A. All original in excellent shape for age. See pics!! I can ship with Anvil case converted to fit shape, but it may be costly due to weight/size. We could arrange for some other option on case. Weight 9lbs 10oz. Nut apron 1 9/16". Handle on case is cobbled together/ works...but not pretty."