'Recently purchased two O scale cars for rebuild that turned out to be Q scale. Have not been able to identify the manufacturer yet.
The hopper is a three piece casting. I three railed the car and added a lot of details. It now rides on Weaver DC trucks with custom body bolsters. The tank car will be a King Syrup car in the future.
Would love to see pictures of other 17/64" cars.
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I have a circa WWII sandcast 17/64" Atlantic City Brilliner shell (shown here with a custom Shore Fast Line Bowser Brill), which I plan to power using a RailKing PCC chassis at some point... 
Mitch
Finally just finished lettering the hopper. Its 20 degrees out so dull coat will have to wait.
Those are some crispy looking letters! Looks great!
Today I learned 17/64" is Q scale. I had no idea!
Q-Scale is 1/4 inch scale utilizing a track gauge of 1 3/16 inches. Q-Scale is close to Proto 48 but not quite there.
https://oscalekings.org/WP/2-rail-o-scale-primer/
"Some other modelers used a track gauge of 1-3/16″, calling it Q gauge, which was close to the actual dimension. One famous Q-gauge modeler was Minton Cronkhite who built the original O scale layout for the Chicago Museum of Science and Industry."
17/64 inch scale has historically been O-gauge/O-scale and utilizes O-gauge 1 1/4 inch track. At 17/64 inch scale O-gauge track scales out to be 4 feet 8 and 1/2 inches which is standard gauge in the prototype world. At 1/4 inch scale, O-gauge track is a scale 5-feet in gauge. Good for Russia and some other countries, but not for North America and Europe which use standard gauge.
"........we should point out that the 1-1/4″ track gauge commonly used in O scale actually measures out to 5′ rather than the correct 4′ 8-1/2″. This came about because early toy train manufacturers used the 1-1/4″ track gauge (which was invented by Marklin in the 1890s) since it was a nice round number, and the small gauge discrepancy was not very noticeable. Some early O scale modelers used 17/64″ to one foot as an exact scale for the 1-1/4″ track gauge........."
When you look at old publications and ads this is how it is approached.
Now to today. Somehow 17/64" inch scale and "Q" scale has become intertwined. I am not sure how that happened but the labeling of 17/64" inch O-scale as "Q-scale" is a recent event.
https://dfarq.homeip.net/q-scale-model-railroading/
On a side note, Lionel's first O-scale strains such as the M10000 were scaled to 17/64.
Back in the day of slide rules and such, 17/64 was not an easy fraction to work with, but today's computers handle 17/64 just as easily as 1/4.
@WBC posted:Now to today. Somehow 17/64" inch scale and "Q" scale has become intertwined. I am not sure how that happened but the labeling of 17/64" inch O-scale as "Q-scale" is a recent event.
This confusion has been an ongoing issue for many years and I suspect that will continue to be so given the numbers of misinformed.
Most of my information on 17/64, Q, unfortunately comes from the internet. It's like P. T. Barnum said, "believe half of what you see and nothing you hear".
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