Angel, get a ruler and measure the frame and you will know for sure what you have.
The fame size was, and still is, determined by measuring the distance between the firing pin centers; the frame size designation is the number of 1/16th of an inch from 1 inch. For example a zero frame would measure exactly one inch between the firing pin centers; a number two frame would measure 1 2/16 or 1 1/8 between centers. If you have a 3 frame it will measure 1 3/16.
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