Looks like 1977. Go to this site and see - Or get it direct from the source at: Brand: Buffet Crampon Instrument: R 13 Serial number: 179986 Year of manufacturing: NOTE: The Buffet on-line serial number database only contains serial numbers for French-made PROFESSIONAL clarinets. If your Buffet is marked 'Made in Germany' this database will NOT work for you and any data it provides will NOT be.
Selmer Sterling Clarinet Serial Numbers
Selmer Clarinet Serial Number Search
Clarinet SerialNumberYearManufacturedL Series:L100012/1/2L325195L660198L99001939M Series:M10002/1/0M34001944(during)M60001945(during)M80001946(during)N Series:N10010/1/46N10002/1/8N490191P Series:P120194Q Series:Q110197R Series:R1201959S Series:S115192T Series:T1401964U Series:U1101966V Series:V100199W Series:W1701971X Series:X1501973Y Series:Y1201975Z Series:Z1101977.