Bob and others interested,
The SHPX 3342 tank car leased by the Hooker Electrochemical Co. was one of 10 cars (SHPX 3337-3346) built as ACF lot 3613 in 11-50. A builder photo of SHPX 3337 is shown on page 64 of the ACF Tank Cars book authored by Edward S. Kaminski.
As-built: Lettered for Hooker, Tacoma, Wash. (centered on jacket)
ACF welded underframe
Apex Tri-lok running boards & dome platform
The 3342 car in the photo had been repainted in a later-version lettering scheme circa 6-53 or later: HOOKER shadow-effect stencils to the left of black center band and Hooker Chemicals to the right of the black center band.