Large Gilbert mantle porcelain mantle clock

This is a large porcelain mantle clock made by Gilbert. It was given to me by my late father in-law, it was his mothers. This is in almost "mint" condition. The porcelain dial face has a faint crack in it. It's in working condition and is all original. Wondering when it was made and it's worth. I have checked the internet and have never come across a picture of a of this clock.