I don't have what your inquiring about. But I can offer you the following info.

Your Gleaner F is a 1976 year model which is the last year for the F series.

Allis-Chalmers offered the following Gleaner F OMs (1968-76).

FORM TM-459A 1001 & up ~ 1968 ?

FORM TM-459B 5001 & up ~ 1969 ?

FORM TM-      (11634..) Ebayers thumb is covering up that info, 9001 & up ~1970?

FORM TM-507 (1163978) 12201 @ UP ~ 1971

FORM TM-512 (1171395) 15401 & up - 1972

FORM 1176356 (10/72) 18601 & up ~ 1973

25801 & up ~ 1975

FORM 71187980, (eff sn 31401-36200), 31401 & up ~1976

Anyway, here is a weblink to an ebay listing thats selling 3 of their original 6 offered. Guessing you could send this ebayer a message asking which 3 are still available? You'd be wanting a 31401, but I don't see that one listed. Although it couldn't hurt to ask, maybe they got one somewhere in one of their piles of books?  Next best one would be the 25801. Good luck

http://www.ebay.com/itm/185690360246?hash=item2b3c0209b6:g:zTQAAOSwNOtjkl~U&amdata=enc%3AAQAIAAAA4Fa%2FvgH%2FgTk%2FaS%2BSSBXQzXeeL1LXcd9GEAZiGUIYUT%2FU8zXWFlU5ppelH41u%2FMSCdEfKbz4iZHn%2FelGNlyGsDH0gi6HL3GtOm6D0GPA9qobdDp77hdducmRuCg9kN42Tcg08Nc4bQXj1KnY1HW5nmiYzciCu1Q10yvqEjPKr4POYFr8wn7t2xsTcUXsTCG%2BnjSQog%2BS6t4fCgr62Ea4aRuJ8LvzW4LE9iNzCZ1gDzKUULi6fQ%2BPS8n0qPbG5uI140dISlCRO9MXeAKt9G1fyxFMDozXWEC6oH%2B8uxH9x5bcn%7Ctkp%3ABk9SR6C5tuCRYw" rel="nofollow - http://www.ebay.com/itm/185690360246?hash=item2b3c0209b6:g:zTQAAOSwNOtjkl~U&amdata=enc%3AAQAIAAAA4Fa%2FvgH%2FgTk%2FaS%2BSSBXQzXeeL1LXcd9GEAZiGUIYUT%2FU8zXWFlU5ppelH41u%2FMSCdEfKbz4iZHn%2FelGNlyGsDH0gi6HL3GtOm6D0GPA9qobdDp77hdducmRuCg9kN42Tcg08Nc4bQXj1KnY1HW5nmiYzciCu1Q10yvqEjPKr4POYFr8wn7t2xsTcUXsTCG%2BnjSQog%2BS6t4fCgr62Ea4aRuJ8LvzW4LE9iNzCZ1gDzKUULi6fQ%2BPS8n0qPbG5uI140dISlCRO9MXeAKt9G1fyxFMDozXWEC6oH%2B8uxH9x5bcn%7Ctkp%3ABk9SR6C5tuCRYw