1957 (12) Naphthadag Automatic Letter Sorting Machine - Display Text Cover - 2½d - Southampton Post Early For Christmas Slogan

Unusual Display Text Cover...

2½d only cancelled with the Southampton 'Post Early For Christmas' Slogan.....

Usually this has the full set of Definitives on it with a Wavy Line slogan... I've never seen this single stamp version with this slogan before.... No catalogue has this slogan quoted on this issue, so 'might' be unique...

Code: 66877