There are numerous strategies to explain to if you have a truly antique classic indication.
-The letters are not excellent.  No two indications are precisely the exact.  If its excellent, it was accomplished with a personal computer and If there are a lot more than a person indication precisely alike, they were not lettered by hand.
-On hand lettered indications you can see the brush strokes.  They have a a little bit elevated and uneven really feel simply because of the paint.
-They are a typical dimension. Indication makers ended up sensible making use of  four ft. x eight ft.sheets, to four ft  x four ft, two ft x four ft, 18 in x 24 in, 12 in x nine in, and so on. Total dimension exhibit playing cards and poster boards are commonly 28″ x 44″, so most exhibit card will be minimize down from that, in measurements these kinds of as 22″ x 28″, 14″ x 28″, and 11″ x 14″ measurements. Paper measurements eight one/two x 11 indications ended up not typical then.
-They have aged obviously.  Truly aged indications do not fade evenly.
-The components applied ended up typical to that time time period.  Previous “steel” indications ended up metal.  Metal will rust.  A magnet will adhere to them. More recent “steel” indications are commonly a baked-on enamel  aluminum. They never rust, and have no magnetic demand.
Talk to by yourself if it will make perception.  A porcelain indication in all probability would not have a rate proven simply because all those indications ended up pricey and price ranges adjust.
It would not make perception if the edges ended up rusty and the relaxation of the indication seemed new.  A porcelain indication will exhibit rust in any location the place the porcelain has chipped off and the metal was uncovered.