I have one very similar, and figure it's around 1930-40. Interesting that New Home did make this same model with minor updates for 40-50 years. the older ones do not have US in the model number and have an older style bobbin winder. I've read that the finishing process also changed at some point, and almost all of them with nice decals are later - after the process was changed. One other thing, the newer styles take the shorter needle, and most have a picture of the needle showing the length at the base of the pillar. I believe it's the shorter needle that Free takes, logical because these probably were produced after Free acquired New Home.
Based on other model numbers, I think yours is US285587. All those I've seen like this have US with six digits.