Although I've put the year of manufacture as 1960s, I'm taking a guess here. The clarinet belonged to my late father, and I know had had it for many years.
Boosey & Hawkes (Imported by Lafeur & sons) Flute in case - Not tested
vintage clarinet manufactured by Hawkes & Son
Clarinet By `Hawkes and son London Good Instrument
Vintage Intermediate Wood Clarinet Signet Special by Elkhart Indiana
SONICAKE B Flat Clarinet for Beginner Ebonite Clarinet Nickel-plated Clarinet UK
