What are natwest pigs?

a mint set will sell on eBay for around £80-£100 but if you have the origonal boxes that will increase the value.on a indavidual basis woody is the cheapest to buy and natanial is the most expensive of the regular 5 pigs.cousin wesley is the gem as only 5000 were made and he is worth alone £250 but beware many ar on sale on auction sites and they are mostly fake.