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I just purchased a new Lo-Pro Edge to replace the tired old one on my 1994 Jem 7V, noticed there are quite a few little differences between the old and new version. Nothing especially interesting but I thought it was worth a comparison for the sake of "why not".
The knife edges, knife edge retainer and trem arm socket are black rather than gold, and the patent line is gone (since it expired so no longer needs to be there).
The sustain block appears to be a different material. The sustain block on the Original Edge in my Jem 777 30th is the same as the 1990s Lo-Pro (left) pictured here with the dull appearance rather than a shine. The knife edges seem to be shaped slightly differently to how the old Lo-Pro was, though it's hard to see in the pictures and due to excessive wear you'd not really be able to tell anyway.
Also some tiny differences like the string block screws, and the ends of the fine tuner rods.

The knife edges, knife edge retainer and trem arm socket are black rather than gold, and the patent line is gone (since it expired so no longer needs to be there).

The sustain block appears to be a different material. The sustain block on the Original Edge in my Jem 777 30th is the same as the 1990s Lo-Pro (left) pictured here with the dull appearance rather than a shine. The knife edges seem to be shaped slightly differently to how the old Lo-Pro was, though it's hard to see in the pictures and due to excessive wear you'd not really be able to tell anyway.

Also some tiny differences like the string block screws, and the ends of the fine tuner rods.