Three very interesting photographs showing the exterior and interior of a Mack bus hosting a traveling electricity exhibit.

I include a higher-resolution scan as the fifth image to better show some of the appliances the bus is hauling around (a number of them are Graybar brand; presumably they sponsored the exhibit along with the electric utilities).

Here's a quote from a 1927 article on the exhibition in the Canton Independent-Sentinel:
With the view of showing and demonstrating the newest appliances, the power companies arranged to have the exhibit visit the communities they serve so that persons may become acquainted with the most recent productions of the electric appliance manufacturers and obtain information through which they may attain the greatest convenience from electric service.

The truck transporting the exhibit is one of the largest ever built, being more than 30 feet long. The gasoline tank has a capacity for 60 gallons.

Entertainment is furnished by an electric public address system used for broadcasting music and which can be heard for several blocks. Also there is a calliope for which an excellent pianist was engaged.

The truck was set up at the corner of 1st & Broadway in Bangor, Pennsylvania; the penultimate image in the gallery is about as good a view I can get of the modern scene in the first photograph.

At bottom right of each photo is a sequential alphanumeric code and the date 8-4-27; note that these were marked on the negative, not actually on the print. 

If you haven't read the Condition Description above, please do. Any photograph that is 100 years old (or thereabouts) is likely to have — at the very least — some light wear and imperfections; I do my best to describe any noteworthy condition issues but, being human, I don't doubt that I overlook the occasional flaw. As always, the best testament to condition is careful scrutiny of the images I supply. 

If you buy/win more than one lot of Mack photos, please either request an invoice so I can combine shipping or, if you prefer, go ahead and pay and I will promptly refund the amount you overpaid for shipping costs. I only charge the amount I pay to the USPS; no markup.

Please read on below.

Last summer I came into a very large accumulation of old 8x10 photos that purportedly once belonged to the Mack Truck corporate archives. Indeed, some — but not most — of these photos are rubber-stamped on the back as being from the Mack Advertising Department. 

Most photos have an alphanumeric code written onto the negative. Many photos also have the date written below the code. My hunch is that these prints were generally printed around the time the photograph was taken, but it's possible too that the dates written on the negative might be the date they were added to the archive. I say this because sometimes a photo will have elements that make me think it might have been taken 10 or so years earlier than the date given. 

Sometimes the photos are of Macks out in the field that have clearly been in service for some time. Sometimes, when the Mack looks shiny and new, it’s likely that the various trucks, buses, and fire apparatus were professionally photographed before final delivery was made to the customer either (1) at or near the factory or (2) at or near the Mack dealer/agent the customer purchased the truck from. 

In this way, we often get to see these fresh-from-the-factory-floor trucks and buses in all their varied liveries, whether it be that of the Rye, New York Fire Department; the Standard Oil Company of Pennsylvania; or the Peninsula Transit Corporation of Newport News, Virginia (for instance). 

I will ship all photos flat in a stiffened mailer that is marked DO NOT BEND.

Please examine images for detail, as they are part of the description. Customer satisfaction is very important to me; please review my feedback and you'll see that I take it very seriously.

Will combine shipping for multiple purchases.  

Thanks for looking!