Secondary World Technology

Sorry it’s been quiet lately.  Holidays and all.

Anyway, I’ve been considering some ideas and have a question for the groupmind.  Has anyone done a secondary world setting where they’ve included modern technology as the baseline (e.g. early-21st century Earth tech as the standard for a non-Earth world)?  If so, how’d you handle it?

I’m thinking about how a lot of urban fantasy (primary world) describes tech (using brand names, firearm calibers, and other recognizably Earth things), but I’m not sure that’s easily translatable into a secondary world.  Or is generic the way to go?  Maybe I should look at some Warcraft fic (admittedly more steampunk-fantasy).