As we all know, there are vast variations in the Esterbrook arsenal but for this first "round" I will keep it simple.
1) In your collection, how many J Transitionals do you have? Forget the jewel and color variations just put the J's in one pile
2) Now, count the quantity of nibs you have loose or in pens.
3) Do the math, how many combinations of Esterbrook writing tools can you have. Remember, J Trans ONLY for now.
I am at work so I will post my results later today.