Datamax Allegro 2 - Manual (Page 92)

Available Fonts and Barcodes
C-4 Allegro2
Font 7 OCR-A, size I. Font 8 OCR-B, size III.
Font 9 Internal Triumvirate font.
Point sizes are selected by the number in the barcode height.
Larger point sizes can be obtained by increasing the height and width
multipliers (see the Programmer's Manual for more information).