Henry Dalley began manufacturing Dalley's Magical Pain Extractor in 1839, but it was his son, Henry Dalley Jr., who introduced Dalley's Galvanic Horse Salve in 1866. It was intended for use in diseases of horses, cows, sheep, pigs and dogs. The list ran from "Galls, old Sores, and Cracked Heels" to "Thrush, Swollen Udders, Cracked Bags and Hollow Horn."

Stamps for this product - perhaps the most beautiful of the private die proprietaries - were isssued from April 9, 1867 to August 9, 1882. 66,684 were printed on old paper, 43,461 on silk paper and 21,400 on watermarked paper. This one is on silk paper.

Magical Pain Extractor had been around for more than a quarter-century before the Horse Salve was formulated. It was reputed to cure burns and scalds as well as releive pain of piles, ague, toothache, scrofulous humors and about twenty other ailments.

Stamps were first issued for Magical Pain Extractor in May of 1865, when it was discovered that there was no period in the upper right amount, making it $100 rather than $1.00. By August, Butler and Carpenter were able to correct this, and stamps were issued until March 1, 1883 with the correct amount - almost. Around the end of 1879 the American Bank Note Company decided to make a new plate, but used the error die in doing so. Any copies printed from this plate show the original error.

21,000 of the original error stamps were printed on old paper. 797,328 corrected ones were printed on old paper and 573,101 on silk paper. 974,423 were printed on watermarked paper, but the number of those showing the error is unknown.

The copy of the corrected stamp is on silk paper, and the copy of the error is on watermarked paper.

A wrapper from a package of Dalley's Magical Pain Extractor.