There Are Tons Of EU/UK Appliances
On these shores.
How did they get here? Probably brought along when people moved house to the United States. War Brides, displaced persons, starting a new life in America, and so forth. There was allot of moving about years before and after WWII remember.
My Pfaff ironer was brought from the EU to these shores. Have seen Miele, AEG, and other laundry appliances that were never sold in the USA on eBay and similar sites as well.
Given the rather small electric power draw of a dry iron it probably would and or did run fine with a small converter. Without a motor the difference in frequency shouldn't cause much if any problems.