Yes, you could call it a 510 Coupe - but really, its proper JDM name "Bluebird 1600SSS" sounds so much better!
The "SSS" name means that the car was equipped with a twin carb version of the 1.6l engine, producing 109hp. That was pretty healthy in a small car like this.
This model was number 138 in the long line of Tomica "Limited" models. The "Limited" models were better detailed versions of the regular Tomica castings (unlike the "Limited Vintage" castings, which are all new).
The regular version of this casting was of course the very first casting Tomica introduced back in 1970, the "1-1" Bluebird. The added detail really brings the old casting up to date, and the bespoke wheels for this edition look great too.