Antique Siebert Childrens Tricycle Troxel seat

 I found these really neat antique tricycles, they are in excellent condition. I have no idea what they worth and I would love to find out a few more details about them. they have a stamp on the seat that says Troxel patented and two more stamps on the bike, one says Siebert speeder and the other J.Moreau & son. pictures attached. I’d really appreciate any help with details about them.Thanks so MuchRavitcz