These are my thoughts. In the hope it will bring a lead??
Any toy like this is normally comtempory with the real thing, as children (in this case a girl) would copy her mother.
The flatbed irons were common in the Victorian era (pre1900). However they were still used in my grandparents time (1940s), heated on her rayburn cooker.
They were mainly used before electricity & if it contain lead it was before they realised it was dangerous especially to small kids.
I would therefore guess its 1900-1930??