.75" originally with silver flashing on brass with threaded post and cap reverse, although nearly all silvering has evaporated over time. Rare early design from Street & Smith, publishers of the pulp magazine. Image is totally different from usually seen design. On this, his hat is different shape, his nose is more prominent, his cape is positioned differently. Other than silvering loss, no damage. Second we've offered and we know of only one other. Our first offered brought $900+. Rare.