Vintage Gillette Thin Carbon blade (6) -- it was still cutting, but I have 9 others in the pack and I've committed to using only the vintage Thins during OCtober in my DEs. I started the seventh shave in a '27 Milady Decolette and while it was still cutting, it wasn't doing the best, and because the razor is light, I didn't want to end up compensating with pressure so I binned it.