257AT/DX  by  14AT158 & 173AT127

                        Click on Thumbnail's below to enlarge
Click image for large version.  

it was a big surprise to receive a postcard direct from this rare prefix, many thanks to Cyril and Stephane.

257 Stamp & postmark  
Click image for large version.   Click image for large version.
257 Postcard (back)   257 Postcard (front)