Original oil and gas trade magazine vintage ad for BOVAIRD & COMPANY. Another Reason For Visiting the Cellar is Done Away With When Underreaming, the Bovaird Grip Casing Spider Can be Operated From the Derrick Floor with a Rope or Wire Attached to the Handle. There is a printing typo as seen at the bottom of the ad where they have the name spelled OVAIRD! This unique 1927 old oilfield petroleum well drilling equipment magazine advertisement would display marvelously matted and framed. Approximate size 8 x 12 inches