I'm interested in purchasing this bike and rebuilding it but I am wondering about it's year, and whether it was a high/med/low quality bike in it's time to see whether it's worth my time and so i don't spend too much on it!

It's got that sports-tourer look to it, with brazed bits on the fork (forgot to take a photo of), a hole at the top of the fork and the style of the dropouts.

53cm seat tube c-t
28.6mm seat tube
27.2mm seat post
Suntour V-Luxe rear derailleur
Suntor Compe-V front derailleur
Dia Compe centre-pull brakes
Sugino Pro Dynamic cranks
Kyokuto Pro-Ace pedals
27-1 1/4 tyres/rims
There was also another sticker on the fork which said "Tagaki" or "Takagi" but i forgot to take a photo of it (doh!)

What's got me a little confused is the seat post width (I measured it with calipers) which should mean that's it's a fairly high quality frame but it's not lugged as you can see and has average/low end components. The rebranding of the frame doesn't help much either.

Any more information would be of great help.