Watch List notes:

Trinidad and Tobago, Central Bank of Trinidad and Tobago, 20 dollars, 1964, serial S/I 623967, certified PMG Choice Uncirculated Net / Foreign Substance. Pick-29c. PMG net graded this note Choice UNC 64 Net - Foreign Substance, yet close inspection does not reveal what or where the foreign substance is, though we did not check under UV light. ($500-700)