3 Hourglass in planted tubular case - probably medical.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: 3 Hourglass in planted tubular case - probably medical. Wellcome Collection. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: 3 Hourglass in planted tubular case - probably medical. Wellcome Collection. Source: Wellcome Collection.