From the reference box # 81
#81 - Small, round vintage tins; Ucal Brand's Zinc Ointment and Chesebrough-Pond's Vaseline. I love these little tins, especially the type on the Zinc Ointment one, it's very ornate in total contrast to the Vaseline one with it's functional, simplicity. Each tin is only 65mm (approx. 2.5") in diameter, but they look great on the book shelf.
As ever I've done a bit of research into the companies and found out that Chesebrough (originally an oil business, whose founder chemist Robert Augustus Chesebrough produced the first petroleum jelly in 1859) merged with Pond's Creams in 1955 to form Chesebrough-Pond's before being bought by Unilever in 1987. I've seen other Vaseline tins from the Chesebrough-Pond's era that definitely look older than this one, soa I'm guessing mine is from the late 60's or early 70's.
Unfortunately I can't find out anything about Ucal brand who manufactured the Zinc Ointment, other than they seemed to have produce a variety of Throat Lozenges, Pastilles and Health Salts in the late 50's.
For more reference box loveliness, have a root around here.