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How do you know it's a snuff box and not a tea box?
Linda C

Contents this old probably no longer emits anything you can smell, but you can try. Take a small pinch of the contents and crush between your finger tips while holding under your nose. If it smells like tobacco, then it is snuff or pipe tobacco; If it smells like tea, then it is tea. If the box has a second compartment suitable for holding matches, it could be a box for pipe tobacco. If it has only one compartment, then it could have been used for pipe tobacco, snuff, or tea. A century ago, sugar was also served at meals in small closed containers.

Since it belonged to grandfather and not grandmother, I'm betting on pipe tobacco.

My hubby collects tobbacco tins the metal ones you slide in pocket ,some of them are pretty valuable