Nice! I see you have the obligatory light leak in the plate holder (I've got fifteen holders for my Ideal, and I think 8 or 9 of them leak under at least some conditions -- eventually I'll figure out *which* 8 or 9). Other than that, it looks pretty good! Rated at 3; that implies it's lost at least two stops, probably more like three or four (original ASA 12 or 25, x2 for the 1960 change in testing method to give 25 or 50), which isn't far out of line for an emulsion that's at least fifty, and possibly up to 80 years old.

You'd most likely pick up half a stop to a full stop in Dektol compared to Rodinal, if that matters to you...