The average nigger robber on the street will recognize a Rahlex or a Panerai. He's unlikely to be familiar with old Seikos, even if they are collectible.
I got a watch similar to the one you linked. A 7a38 with black subdials and a different bracelet. A few years ago you could still find these on eBay. But it took a long wait until one showed up in decent condition. Not exactly like this one, 7a38s also have day and date windows.
I love old Seikos and the 7a series is great. The Collector's Guide article you linked describes why these movements are special.