I agree with Infinityeye, it appears to be late 1970s, possibly very early 1980s. I would consider it upper entry level, but that's not too far off Infinityeye's lower, mid-range. The Puch 482 tubing was advertised as carbon-nickel steel, which would make it similar to Raleigh's 2030 and Motobecane's 2040.

I have seen some variation in the components mentioned by Infinityeye, which may be model year variations. Specifically, I've seen SR Silstar cranks and 27" Weinmann, aluminum rims. I can attest to Crane rear derailleurs being original equipment, normally paired with a Titlist front derailleur and stem shifters. Complete weight was about 28 lbs and original cost $200-$240 US, depending on the exact year.