This is a really nice example of a 1970 DA. Original parts, original pickup, original case. Current owner in Alameda, CA has it up for sale on Craigslist.
"RARE Vintage 1969 1970 Ampeg Dan Armstrong Guitar - All Original $3000"
"Serial # A1424D. EXCELLENT all original condition, safely kept in a smoke free studio for the past 10 years. Sounds and plays GREAT! Low Action - Low 1/16", High E 1/16"
"Comes with 2 pickups - Rock Treble & Country Bass. Grover Tuners. There are 2 light scratches near the bridge, 1 near the pickguard, and 1 in the cut-away. The body shows normal wear with a small amount of buckle rash on the back. 24 fret rosewood fingerboard. All frets in excellent condition."
"Comes with original hard case. Left latch on case has broken spring but still securely closes case."