Here you can select the number of cards to be placed in a row for each of supported screen resolutions. Your current resolution is highlighted in this way.
This is the actual Form 1549A, the receipt attached to a USPOD cover, apparently sending it to a patron. Scan from USSS Specialist, Nov 2005
1913
172
FOS-002
595
Fostoria
OH
10/2/1911
The 1549A Label on reverse of cover. From AK Exhibit
1911
173
NY-066
86201
New York
NY
10/8/1910
From AK Exhibit
1910
174
NY-065
63061
New York
NY
2/18/1910
From AK Exhibit
1910
175
MAN-003
4746
Manchester
NH
10/1/1910
From AK Exhibit
1910
176
POR-004
16617
Portland
ME
12/16/1909
From AK Exhibit
1909
177
WDC-020
52281
Washington
DC
3/27/1909
From AK Exhibit
1909
178
DEN-006
11119
Denver
CO
9/22/1909
1909
179
LA-015
60399
Los Angeles
Sta N
CA
11/29/1910
Image from exhibit, addressee name and address missing
1910
180
PIT-018
94705
Pittsburg
PA
1/26/1910
Only 5c postage, apparently two stamps for 8c or maybe 13c missing. The New York Exchange Office label that should be present is also missing. On the reverse, there is the upper portion of the next 1549A label with the number 94706 showing.