Here are five older metal heart beads. The holes run sideways and are fairly small, but at least 1 mm.
These are from my older stock of beads. Pretty sure I picked these up in the early 1990s as brand new, some of my first bead purchases or by 2001 or so at the latest.
These five are the remaining ones left that are in the best condition, but there are imperfections on these as well and some general light discoloration of the metal so please check the photos carefully prior to purchase.