Originally Posted by
T-Mar
There are a few different Sterling brands but this one was owned by Lawee, so it is a sister brand to Univega. Lawee introduced their Sterling brand in 1985. Based on the rear derailleur, I'd place this one circa 1987-1989. The serial number may allow us to determine the exact year and manufacturer. The pedal brand is Victor, also known as VP.
I checked for the S/N. Nothing on BB, but just above on seat tube there was "D970". Does that help at all?
EDIT: looking at my pic, I see numbers that I missed initially
. So under the "D970" are these 6 numbers: 553473