I have a bunch of cards like these that all slotted into a "Cabletron" network rack. Wasn't expecting this level of gold plating before I started opening it up. Even the backplane board from the unit had this same level of plating.

Is this just a Telco board dressed up fancy or did I stumble onto something more?

I would go with high telecom, but email Chris to be sure. It might go even higher.