The Ball Watch Ball Engineer DG9000B-S1C-WH 40mm Stainless steel White (Ref. DG9000B-S1C-WH) is a luxury mechanical wristwatch. On the secondary market, the Ball Engineer DG9000B-S1C-WH 40mm Stainless steel White averages $3,100 across 1 active listing. When buying pre-owned, check condition grade, box and papers (typically a 10–20% premium), service history, and originality of dial and hands. Use the listings and price history on this page to benchmark fair market value.