one small detail i'd mention: the lugs around the headtube look like a 610 to me for some reason. and possibly the lack of bottle cage braze ons on the seattube.

i happen to have owned a 1984 610 and now a 1985 1000. my friend owns a 1985 610. the 1000 lug work i've seen is a bit thinner and more refined but it's difficult to say as the catalog scans don't show details for every year in the 1980s. you can see some examples from close up photos people have posted.

frame details sure look almost identical to my old 610 though imo. still a nice tourer!