This firm produced perfins from 1914 to 1946. Although postal tax stamps were used from 1938, we have not found any that have a perfin.
Here are some NCB covers produced in that time:
Used 10 June 1930 to Paris, France, via New York
NCB perfin on two 2¢ Máximo Gómez definitives (1930) - Scott 309, Edifil 252
NCB perfin on 1¢ José Martí definitive (1930) - Scott 308, Edifil 251
NCB perfin on 5¢ airmail definitive (1927) - Scott C1, Edifil 222
Cuban NCB Perfin on United States 5¢ Winged Globe airmail (1930) Scott C12.
The U.S. stamp was applied in Havana, but not canceled until Miami, as its sole purpose was to pay the U.S. internal airmail rate.
The 5¢ Cuba airmail stamp paid the airmail rate from Havana to Miami, and the additional 5¢ was to pay for the UPU surface rate overseas.
Window envelope used 18 October 1922
NCB perfin on 2¢ Máximo Gómez definitive (1918) - Scott 266, Edifil 206a
Used 23 June 1925 forwarded to New York City, USA
NCB perfin on 2¢ Máximo Gómez definitive (1925) - Scott 275, Edifil 215
Used 14 November 1929 to New York City
NCB perfin on 2¢ Máximo Gómez definitive (1925) - Scott 275, Edifil 215
Used 14 November 1929 to Hamburg, Germany
NCB perfin on 5¢ Calixto García definitive (1925) - Scott 276, Edifil 216
Note that this is sent from the Manzanillo branch of the bank
Used 9 April 1930 to Solingen, Germany
NCB perfin on 5¢ Pan American Games commemorative (1930) - Scott 301, Edifil 241
Used 19 October 1932 to New York City
NCB perfin on 1˘ Pan-American conference (1928) – Scott 284, Edifil 223
NCB perfin on 5˘ Capitol series (1929) – Scott 296, Edifil 236
NCB perfin on two 10˘ Capitol series (1929) – Scott 297, Edifil 237
Used 1 March 1932 to Elmira, New York, USA
NCB perfin on a 10¢ Capitolio commemorative (1929) - Scott 297, Edifil 237
NCB perfin on 3¢ José de la Luz Caballero definitive (1930) - Scott 305B, Edifil 253
Used circa 1933
NCB perfin on 2¢ José de la Luz Caballero overprint (1933) - Scott 318, Edifil 272
NCB perfin on 3¢ José de la Luz Caballero definitive (1930) - Scott 305B, Edifil 253
Used 21 April 1937 to New York City
NCB perfin on 10¢ Tomás Estrada Palma definitive (1935) - Scott 307, Edifil 247
Used 14 October 1938 to Nashville, Tennessee, USA
NCB perfin on 10¢ Estrada Palma definitive (1930) - Scott 307a, Edifil 247
Window envelope used 10 January 1940.
NCB perfin on 5¢ tobacco propaganda (1939) - Scott 358, Edifil 332
Interestingly enough, the 1¢ postal tax stamp (1939) - Scott RA2, Edifil 2, does not have a perfin.
Scarce, unused perfin stamp on self-addressed return envelope of the bank.
NCB perfin on 2¢ Máximo Gómez definitive (1918? 1925?)
Scarce, unused perfin stamps on self-addressed return envelope of the bank.
NCB perfins on 1¢ and 2¢ Tobacco propaganda - Scott 356 & 357, Edifil 330 & 331 (1939).
Interestingly enough, the 1¢ postal tax stamp (1940) - Scott RA3, Edifil 3, does not have a perfin.
And here are some of the stamps which have NCB perfins: