I spotted a Trek 1500 very much like pic related for sale on the local secondhand listings. The listing says Ultegra components and little more and adds a shitty picture, while better pictures on an old ebay listing show ultegra derailleurs, shifters and crank. I've seen this color scheme pictured or mentioned in about 4-5 listings or forum posts online, but no mentions of its model year or circumstances.

The information I found on Trek's sike, Vintage-Trek.com and Bikepedia doesn't seem to even register a bike with this color scheme or provide specs consistent with the parts it appears to have. Some 80's models are listed as blue/yellow, but this does not look like an 80's bike.

Is the unusual color scheme a reason for suspicion - possibly a counterfeit? Was this some sort of special edition?
What do you reckon the date of manufacture to be?
Does this look like a painted carbon fork? The mid-2000's 1500's are listed with carbon forks, but none of the listings for this color variant mention it.