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It has been produced for more than 30 years without any modification except material change from chrome plated zamac to SS. Only SS version is produced today. This one I have is older chrome plated version.
Many of whom tried this razor think that it is the best AC shavette ever. It is a very comfortable, excellent razor.
I had the same blue scaled one, too. I just don't count it as different kind. For me, It's just a variation of BBR-S with different colored scale.
I didnt know a green scaled one exist. Thanks for letting me know.
If you scroll this thread up, I anwered my own question. There are two more Schick Prolines. One is BBR-1 and the other's name is unknown to me. I had a couple of opportunity to purchase both of them but I didnt. because I dont collect them any more.
And there could be more. If you find some info, please let us know.