I can't say exactly when each model was debuted, but I have some small notes which may give you some idea of when they were shipped from the Canadian division of EMD -
a GP-7 unit was delivered to TH&B in 1950
a GP-9 " TH&B in 1954
a GP-30 "...
I'm sorry, gentlemen (faroukstan and mr_bnsf), but since the company (EMD) has been sold to a different owner, and many of my older contacts have been 'retired', I am no longer in a position to give you any leads for the information that you require.
I believe many of those EMD units were made at EMD's former division (General Motors of Canada, Diesel Division) in London, Canada. I worked there for 30 years until my retirement 5 years ago. I recognize some of the export model numbers.
I have an 060 steamer and an SW9/1200 switcher, both Life-Like N-gauge. I'm very pleased with the way the run, after I corrected some track and turnout mis-alignments in my small 12" x 60" yard.
A barn similar to the one in the link, but with a more shallow roof, I think, has been rescued from a farm near West Lorne, Ontario and is being re-erected by a landscaping compeny in or near the village of Muirkirk, also in Ontario.
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I don't see the 'Quick Links' icon either.
I'm finding that my browsers are too old to take full use of most sites that I visit now. The only reason I can make this post is because I switched from an old Netscape browser to IE.
I guess I need a new system.
Dang! There goes the...
Quality pictures, Ron.
I attend two or three steam shows a year, and I have yet to see one over here with a cover on the flywheel as on this roller. It really is amazing to see the large agricultural tractors in motion.