Antique Oil Lubester - $50 (Loves Park, IL)

Pump has original wood knob.
Pump stamped with R5513X.
Name is gone from top aluminum plate, but has #GS2A-5 stamped into the metal.
Steel hand cart has two 8" diameter cast wheels.
Overall: 18" wide x 39" tall.
Bottom of metal tank is stamped "Rheem 20 14 11 40" Tank is 14" diameter x 22" tall; 15 gallons.
Bottom of tank appears to have lettering looking like Sinclair with partial emblem.
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but very hard to read No holes or rust in tank.