AYA Shotgun Serialization (Aguirre y Aranzabal) – From 1945 to 1994 AYA had manufactured over 1970 9559 600,000 shotguns of all models and grades with all serial numbers assigned in chronological order. For 1927-1944 year of manufacture date codes, see “Spanish Year Of MFG. Date Codes” in this section.
AYA Serialization 1945–1994
| Years | Start Serial | End Serial |
|---|---|---|
| 1945–1948 | 0001 | 19999 |
| 1949–1954 | 20000 | 71999 |
| 1955–1959 | 72000 | 115286 |
| 1960–1965 | 115287 | 222508 |
| 1966–1971 | 222509 | 378548 |
| 1972–1977 | 378549 | 481401 |
| 1978–1983 | 481402 | 576551 |
| 1984–1987 | 576553 | 599999 |
| 1988–1993 | 600000 | 602422 |
| 1994 | 602423 | 602642 |
Beginning 1995 the Spanish proof house implemented a new serial number system. The new system consists of four sets of digits separated by a hyphen. The first set is the manufacturers code, the second designates the type of firearm, the third set is the firearms chronological number, the fourth set shows the year of mfg.
AYA Serialization 1995–2006 (New System)
New serial format: XXXX-XX-XXX-YY (last two digits indicate year of manufacture)
| Year | Start Serial | End Serial |
|---|---|---|
| 1995 | 16-03-001-95 | 16-03-800-95 |
| 1996 | 16-03-001-96 | 16-03-755-96 |
| 1997 | 16-03-001-97 | 16-03-642-97 |
| 1998 | 16-03-001-98 | 16-03-677-98 |
| 1999 | 16-03-001-99 | 16-03-719-99 |
| 2000 | 16-03-001-00 | 16-03-758-00 |
| 2001 | 16-03-001-01 | 16-03-645-01 |
| 2002 | 16-03-001-02 | 16-03-645-02 |
| 2003 | 16-03-001-03 | 16-03-781-03 |
| 2004 | 16-03-001-04 | 16-03-703-04 |
| 2005 | 16-03-001-05 | 16-03-652-05 |
| 2006 | 16-03-001-06 | 16-03-750-06 |
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