Vtg orig Illustration 68 Pontiac LeMans /GTO 400 Detroit painting Ad Art 3 /40

Up for consideration is a very rare early automotive  illustrative painting advertising the options and upgrades for a 3rd generation Pontiac Lemans in the 1968-70 era. The advertisement makes reference to the 400 engine possibly promoting the GTO package in one of the sketches...The work of art itself is mounted on artist board and measures 8.5 inches by 11.5 inches. With overall dimensions being about 15 by 20 inches. This is the type of work that was used when pitching visual layout of the ad to General Motors execs for approval. These were more or less the equivalent to a working sketch...probably not the finished product...you know the old story board layout and Mad Men pitch...then in final production after approval possibly a more refined copy...however please note that early advertising brochure art and cars of earlier times focused on a more realistic approach to copying the cars image...however the looser more "Mod" modern styles eased up on the artists renditions allowing for a groovy type wash over style in a variety of colors in the later part of the 1960's and onwards..etc..you dig?  The final advertisements were everywhere!!! These ads were placed in magazines brochures etc... all over North America which includes Canada...  Please understand this is a work that is done by hand by one of the firms here in Detroit in the mid 1960's. It is unsigned...provenance to be revealled to buyer...It was Purchased from the estate of an original Detroit illustrator who was active at that time and hoarded other works prior to his efforts and after.   Please understand I have about 40 pieces to present. If you have any questions or something to share please message me...Buyer pays shipping...signature confirmation when and where applicable.     Celebrating 25 years of dedicated service here on eBay and we stand behind all our offerings....always real...fresh and authentic... others think so too. Please be safe out there! Warmest Regards, Johnny JohnnyCrystal Est. 1987