My opinions:
First of all, I was invited by the Bennett Pump Company, in 1996, when they closed their Muskegon, MI plant, to come there and go through their literature, they wanted to help me with as much as they could for my Gas Pump ID book.
I also got a great deal of literature about their ECO Air Meters. Not one piece of ECO literature mentioned anything different about the meter that was being sold in Canada.
Now for the opinions:
I believe all meters were made in Muskegon, none were made in Canada.
Those going to Canada were supplied with the Canadian a face plate and the ID tag stating Canadian.
None had holes in the chrome, as I stated above, this was done by a rebuilder.
All the parts for the ECOs were made by small machine shops in Michigan. I remember getting parts form ECO that were still packed in the original boxes that the machine shops used to send the parts to Muskegon. Why would Bennett have molds/parts made in Muskegon and then in Canada when it would be cheaper to just have them made in Michigan, then shipped to Canada?
I also have some that have stated they believe the main spring is different for the Canadian models, meaning there is one for psi and one for metric. It doesn't matter, the spring is the same, it is just a matter of calibration. Plus, not anywhere in any of the ECO literature I have does it mention a main spring for psi and one for metric, it is the same one.
This subject has come up about three times now, while I appreciate the Canadians thinking a piece of chrome with a screw going through it means the entire meter was made in Canada, I ask, do you really think this is good looking?
One more thing, there was a very large company in Hartford, CT, called PMP. They were a rebuilder of VR computers and ECO air meters. When they rebuilt the meter, they changed the face, putting on one that stated PMP, not John Wood/Bennett. They also had their own ID tag made, again stating PMP, not Wood/Bennett. Just because it has PMP on it, doesn't mean it wasn't made by Bennett.
Research before you make assumptions.
Jack Sim