1931 Agricultural College Fund

Stamp 378
GQ-s.jpg 1.50+50 P/C
blue

1931 Commissioning of the Canon Ship "Humaita"

Stamp 379
GR-s.jpg 1.50P
violet
1.50P
blue

1931 Airmail

Stamp 381
GT-s.jpg 1P
violet red
Stamp 382
GT1-s.jpg 1P
dark blue
Stamp 383
GT2-s.jpg 2P
orange
2P
dark brown
3P
greenish blue
Stamp 386
GT5-s.jpg 3P
ultramarine
Stamp 387
GT6-s.jpg 3P
rose
6P
greyish green
Stamp 389
GT8-s.jpg 6P
violet
Stamp 390
GT9-s.jpg 6P
blue
Stamp 391
GT10-s.jpg 10P
bluish green
Stamp 392
GT11-s.jpg 10P
red
Stamp 393
GT12-s.jpg 10P
blue
10P
brownish yellow
Stamp 395
GT14-s.jpg 10P
light red

1931 Airmail

Stamp 396
GU-s.jpg 5C
greenish blue
Stamp 397
GU1-s.jpg 5C
dark green
Stamp 398
GU2-s.jpg 5C
red
Stamp 399
GU3-s.jpg 5C
violet
Stamp 400
GU4-s.jpg 10C
dark violet
Stamp 401
GU5-s.jpg 10C
violet
Stamp 402
GU6-s.jpg 10C
brown
Stamp 403
GV-s.jpg 10C
ultramarine
Stamp 404
GV1-s.jpg 20C
red
20C
bluish green
Stamp 406
GV3-s.jpg 20C
light green
20C
yellowish green
Stamp 408
GW-s.jpg 40C
yellowish green
Stamp 409
GW1-s.jpg 40C
greyish blue
Stamp 410
GW2-s.jpg 40C
red
Stamp 411
GW3-s.jpg 80C
dark green
Stamp 412
GW4-s.jpg 80C
red
80C
greyish blue

1931 Airmail

Stamp 414
GX-s.jpg 3/4P
light blue
Stamp 415
GX1-s.jpg 4P
light blue

1931 The 50th Anniversary of Foundation of San Bernardino

Stamp 416
GY-s.jpg 1P
olive green
Stamp 417
GY1-s.jpg 1P
red

1931 New Year - Issue of 1930 Overprinted "FELIZ ANO NUEVO 1932"

Stamp 418
GZ-s.jpg 1.50P
Maroon
Stamp 419
GZ1-s.jpg 1.50P
violet carmine