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Around 1989 the Vito Yamaha serial numbers change and are no longer in sync with the YAS-23.

The YAS-21 style saxes with fixed thumbrests seem to go up to 1979/1980.
Then they become the YAS-23 style saxes with no fixed thumbrests.

The Vito 7131RK (Yamaha) has Japan stamped near the serial number.
The Vito 7133 (KHS/Jupiter) doesn't have Japan stamped on it.


Yamaha-built 7131RK
Vito Alto Saxes

Vito 7131RK Yamaha Japan Ser. No's
Year S/N Start S/N End
1970000001 000500
1971 000501002155
1972002156 003529
1973 003530004421
1974004422 012000
1975 012001 025603
1976 025604 030827
1977 030828 033947
1978 033948 038844
1979 038845 042434
1980 042435047975
1981 047976 052455
1982 052456 058306
1983 058307 062177
1984 062178 068524
1985 068525 072535
1986 072536 078579
1987 078580 085091
1988 085092 089758
1989 089759 501000
1990 501098 510332
1991 510333 511518
1992 511519 515800
1993 515801 519845
1994 519846 526925
1995 526926 533097
1996 533098 537807
1997 537808 552998
1998 552999 560613
1999 560614 575843
2000 575842 587455
2001 587456 624567
2002 624568 654084
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