I don't speak Swedish, so limited my research to English. This is what I found:
Waffles are "vafflor." They are traditional for Annunciation Day, "Varfrudagen," in mid-March. Swedish waffle recipes differ significantly from American and Belgian waffles. The cook makes a smooth paste with roughly equal volumes of flour and water, then aerates it by folding in whipped cream (2X un-whipped cream : water) just before baking. Those recipes which were produced with pictures often showed heart-shaped waffles.
Heart shaped, cast-iron waffle irons were, at one time, fairly common and are now sold as "antiques," dated back to the 20s by their sellers. I've had experience with
antique cooking items, and while I don't doubt the sellers' sincerity their accuracy is suspect. I'd guess something more like the late 80s.
Square, aluminum, stove-top "Belgian Waffler" by
Nordic Ware, available many places. Nordic Ware also makes a very nice KrumKake iron.
Round, cast iron, stove-top waffle iron from
Rome Industries (amazon.com). Rome industries also makes a "Chuck-Wagon" waffle iron with some seriously long handles, designed for outdoor cooking. The hinge is designed to spearate easily for some esoteric reason.
These folks may have a clue, but you'll have to contact them:
kioskkiosk.com/p/364]KIOSK - Cast Iron Waffle Iron
Heart-shaped, electric waffle irons sold by
Cutlery and More (made by Chef's Choice), and JC Penny's (mfgr unknown). These are small, table-top irons, and shouldn't can't imagine any storage problems. Current, on the other hand ... I've purchased, several times, from Cutlery and More. On the initial purchase there were several problems -- some their fault, some the fault of others. Cutlery and More took care of all of them quickly, efficiently, and without excuses. That's the best compliment I can give. I've also owned stuff made under the Chef's Choice name, and all of it has been very high quality. Nevertheless, I thought these particular irons were overpriced. If I were ordering one of these, I think I'd order from Penny's.
Given the apparent popularity of the shape in Scandinavia, I'd guess that stove-top irons are still in production there. If you're passionate about this, you might want to e-mail some of the people who've posted "Swedish waffle" recipes.
Good luck on your search,
BDL
ON EDIT: OK. I found them. Google the terms, "skeppshult waffle." Skeppshult being the place these particular irons are made. However, given that these beauties are going for UK 60 pounds, I think I'd buy the Prima electric iron from Amazon.uk for UK 20 pounds. But that's me.