Series datasheet PG192128-B for a 192 x 128 dot graphic LCD module, 99.0 KB in PDF format. The B letter appears to be a document or series revision rather than a fully specified option code. Expect general pin assignments, electrical ratings, interface timing and an outline drawing shared across the variants of this size. It is a convenient reference for tracing the display connector and checking bias voltage on equipment using this panel. For backlight and temperature specifics, compare against the full suffix printed on the module.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @acodis_lcd_datasheets_EDID. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.