Bradford, PA: Kendall Refining Company, 1937. 1 of 8 cc total. 7 ll, typewritten text recto only [carbon copy]. Illustrated with 1 folded leaf, a facsimile log-sheet for Jenkins' 48 hour run Sept 21 - 23, 1936, showing 7 parameters [MPH, Oil Pressure, H2O out, engine oil temp, axle oil temp, transmission oil temp & atmospheric temp], as recorded over a 52 hour period. 16 captioned b/w snapshots [~ 2-3/4" x 4-1/2"], 15 of the car [et al] & 1 of Jenkins, tipped-in to 4 leaves following the log-sheet. 11-1/8" x 8-1/4". Bound in a manilla folder. A VG+ item. Item #34949
1 of 7 carbon copies of Robinson's typewritten report to H. C. Bougey, Chief Chemist, General Motors, wherein Robinson details the results of sponsored speed run(s) in 1936 "to establish Worlds' speed records with a view to utilizing results for advertising and sales promotion."
The car built was anchored by Duesenberg chassis, and powered with a Curtiss Conqueror Model V-1570 engine, producing 445 HP. Tires were Firestone. All lubricants, from engine to chassis, were Robinson. The driver was David Abbott "Ab" Jenkins, who just the year prior, had established a 24 hour land speed record of 135 mph. For these sponsored attempts, as sanctioned by the American Automobile Association, there were 4 testing periods: Sept. 7th, 21st - 23rd, & the 28th. And resulting were the establishment of 19 speed records, from 169.57 mph for 100 mile distance, to the 48 hour endurance, at 148.62 mph. And oh yeah, Jenkins upped his 24-hour record to 153.76 mph.
Since the letter notes 7 other copies of this report were prepared, we can't, in good conscious, term it "unique", but certainly a rare item documenting the constant quest for more speed, in this case a successful one at Utah's Bonneville Salt Flats, a place made famous by Jenkins [and others] in these feats of automotive 'chest-thumping'.