The numbers , also knows as "revision" is the oldest - newest versions of runescape [graphical updates, combat etc]. e.g a 317 rsps would be back in like 2006. old style of runescape a 742 is what you want or 600+ thats the new release of runescape.
Hope i helped. RuneScape Private Servers | RSPS - RuneLocus go look for some there.
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