Hi WillHub,
Welcome to the club and congrats on your new Sunny!
Since you know your camper is a 1979 camper, you can back into the model from the floor plans of camper in the 79 sales brochure we have in our FILES section.
To get to the files section, you need to be logged into the forum.
At the top of the forum are tabs, look for the word "FILES" click it.
Once into the files section, scroll down to the "Sunline Brochures" section. Go in there and find a sale brochure for the year camper you are looking at and down load a copy.
I looked quick, and it is hard to tell from only the one door side pic. For a 79 camper to have 3 windows on the door side seems to indicate is might be 17 1/2 SB or a 19 1/2 SB, but you only have 1 axle. Those 2 models point to a tandem axle and yours is single axle. The other odds part, the 79 brochure has what looks like your 3 side window camper in a single axle on page 1 of the brochure, just no model seems to match any of the floor plans and specs of the weight ratings. If you know the length from the tow ball coupler to the back bumper, that helps hone in on a model as well. Or post pics of the other 3 sides of the camper.
SunlineFan is our older camper guru and he may be able to sort this out.
Hope this helps,
John
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Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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