![](/thumbs/pennsylvania/philadelphia/THM_7163.png)
Northern Coast/Office/Tropics
![](/thumbs/pennsylvania/philadelphia/THM_7165.png)
Tropics (Artist's Signature)
![](/thumbs/pennsylvania/philadelphia/THM_7170.png)
Mail Delivery/Home/Mail Delivery
![](/thumbs/pennsylvania/philadelphia/THM_7175.png)
Home (Artist's Signature)
![](/thumbs/pennsylvania/philadelphia/THM_7164.png)
History of Mail Transportation by Water
![](/thumbs/pennsylvania/philadelphia/THM_7169.png)
Mail Transportation by Air
![](/thumbs/pennsylvania/philadelphia/THM_7174.png)
Mail Transportation on the Ground
![](/thumbs/pennsylvania/philadelphia/THM_7184.png)
North Philadelphia Station Post Office