I was playing around at their web site and I think I've got the URL code figured out so you can get a look at the front or back of each and every card:
...will bring up this card, Ernie Banks,1959.
You can see there are several pieces to the URL, and they are fairly easy to decode.
Every card starts the same
Next, the season is added: http://cnt.toppsmillion.com/img/cards/1959-BB-
Next, comes the series marker, either TS1 for series one, or TS2 for series two. BUT, this applies only to cards from 1993 and beyond. Everything prior to 1993 is TS1.
The next piece is the cards number: http://cnt.toppsmillion.com/img/cards/1959-BB-TS1-350-NA_
Now you add F for the front of the card or B for the back
And they all end with the same jpeg dimension:
If I want the back of Ron Santo's card from 1963, #252, the url would be
It only gets tricky for 1993 and beyond, when you need to know where series one ends and series two starts. This handy little chart of the series two numbers should help:
To make it even easier, just cut and paste this template into your browser and make the appropriate changes to find your card.
I bookmarked the template, and so I just make the changes and I'm there!
Congratulations, you know have all of Topps baseball cards at your fingertips!
EDIT: As mentioned by Night Owl in the comments, here is a different way I came up with last year, though it is a bit more complicated.