Pickled Eggs

I love pickled eggs and am planning to include them in a Christmas gift package my wife, kids and I are putting together. My question is "How long will they last unrefridgerated?". My recipe calls for refridgeration, but with all the vinegar and salt, I would think they would be "cured". See recipe below. Eggs: Cover with water and heat to just boiling over medium-high heat. Remove from heat, cover and let stand for 10 min. Drain water from eggs. Now take the hot eggs one by one (wear a kitchen mitten, the darned things are hot!), crack them with a spoon or just whack them on the counter and drop them into a pot of cold water. This makes them much easier to peel whole. Ill resist the urge to bore everyone with the thermodynamics involved. Place eggs in refridgerator overnight to chill. Pickling Mixture: This is the basic mixture, as with BBQ sauce, feel free to improvise: ground mustard, hot sauce, chipotle peppers, curry, red pepper flakes, white pepper, whatever sounds good. Bring the entire mixture to a boil for approx. 10 min. Pour over peeled, chilled eggs, a large mason jar holds about 1 doz small eggs. Seal lid and place in fridge. Theyre good the next day, even better the next and the next. Im not sure if the refridgerator is necessary or if its just because theyre better cold. Posted to bbq-digest V5 #709 by "Britt C. Scheer" <bscheer@cei.net> on Nov 18, 1997