https://www.oldhouseonline.com/house-tours/mission-revival-style

Well,, these are foundry stamped and look to be Spanish Mission style or Spanish/Colonial Revival which was most common in California !! Thats why I asked if you were in CA !! Of course other areas also used this style but it was less prevalent !! I know you were likely thinking Pennsylvania Dutch but what you would have found there would have been a simpler strap hinge or L bracket hinge !! Pennsylvania Dutch would likely have been hand made rather than stamped !! Looks like this hardware had a hard life !! Probably came from a salvage project !! Look at the second house in the link above,, thats the type of house I would have expected to see this hardware on !! If the other number on the back of the face plate is 1903 that is likely the date of mfr !!