Iron has some logic problems. Samuel Brown's internal combustion engine (1823) , Jedlik's dynamo (1827), Faraday's disk (1831), and Pixii's Dynamo (1832), are just a handful of the things that predate the PoD of 1843. And yet they don't exist in Iron even in 1925.

Similarly while Maxwell never went into electricity and magnesium in this reality the idea of "wireless telegraphy" dated back to the 1830s...again before the 1840s divergance.