Test tube
- Made:
- before 1960 in unknown
6 long test tubes (180mm x 14mm) wrapped in pairs in pages from a London 'phone directory from pre-1960s (possibly a lot earlier). Tubes had writing on eg. 'AB75'.
6 long test tubes (180mm x 14mm) wrapped in pairs in pages from a London 'phone directory from pre-1960s (possibly a lot earlier). Tubes had writing on eg. 'AB75'.
