Sidsen sent in this question. Thanks buddy!
Note to guest quiz masters: If the question you sent gets posted, pls post a comment under that post. (it can be the answer, extra fundae, rant for posting the question late and so on). In case we decide to give a free point for those who send guest questions(its being debated :) ), it will come in handy.

Now for the question:

While this stamp commemorates the introduction of the si system, the picture is a representation of what?

Cracked By: udupendra , madhur , nishas thambi , shenoyvarun86 , Dibyo , Poornima , jayanth , bs , duriel , shashank.

udupendra, madhur, nishas thambi, shenoyvarun86, Dibyo, Poornima, jayanth, bs, sidsen, duriel and shashank