Close-up view of the chassis for a 1932 Packard Twin Six car. Typed on back: "Ninth series--Mechanical." Handwritten on back: "1932 Packard Twin Six, Ninth series, Model 905. 12 cy., 150 b.h.p., 142 1/8" whb. Chassis @ 3600 r.p.m., 375-74 c.i.d. Prototype engine designated X-378. Note: Angleset hypoid differential. Extended X-member frame (wide base). One-piece tubular propeller shaft."