I know some people collect the number 13 on stamps but I am not sure that many people would consider that lucky.
Others collect only 1 cent stamps with nice cancels (Socked On The Nose types).
What about the Number 7 in Western culture or the Number 8 in Eastern culture?
I just received a cover from Hong Kong (China) in the mail with this postmark / cancel on the front and back (stamps on front and back also):

In numerology, the divination of your (or something's) destiny by numbers, you add up all the numbers in a name (or cancel?) to get the resulting 'important' number. This is achieved by adding together multiple digit numbers to get a single number. So 11 would be 1 plus 1 = 2.
This cancel, 11 4 11 is 11 April 2011.
11 = 1 + 1 = 2
So 2 + 4 + 2 = 8 (lucky or auspicious number in Eastern numerology)
Or 11 + 4 + 11 = 26 = 2 + 6 = 8 (lucky number again)
On the cover there are 8 large stamps with 4 cancels from the 4th month. What's the number '2 TCL' on the bottom of the cancel? Four number 2s are 8, either multiplied or added.
I live in apartment 206 = 2 + 0 + 6 = 8.
Do all these numbers and stuff make this a lucky cover, or cancel to someone? Am I always trying to be number 8 but things aren't really adding up for me? Do any medical problems happen because I have a horseshoe somewhere sideways and it's just not quite right?



Anything else similar out there anyone?