Weight of a coin in holder 0

[W.W.W]

I had bought a coin from Heritage-- a 1808 10 Cash from India Madras for which they claimed it was a rare one with a thick planchet (heavy issue) with a medal rotation.

https://coins.ha.com/itm/india/world-coins/india-madras-presidency-10-cash-1808-/a/3015-25128.s?ic4=ListView-ShortDescription-071515

Recently during a discussion it came up that the coin might not be the thick planchet issue and the only way to find out was to crack and weight it. I do not want to lose the older older and also the fantastic provenance. The certification page listed the weight retrospectively as 6.47g (as Heritage had given). My questions are--

1- Is there an internal record kept of the weight of the coin which was used to update it later on?

2- If no such records are kept then is it possible to find out the weight of the coin by weighing the coin in slab and then subtracting the weight of the older holder?

 

I really want to get to the bottom of this and would really appreciate it if the NGC folks can get me the answer.

Thank you!

Edited December 31, 2022 by W.W.W

[CrystalM CS]

Hello! Thank you for reaching out to NGC. For security reasons, we cannot give out the exact dimensions or weight of our holders at this time and we apologize for any inconvenience this may cause. I am so sorry that I cannot be of further assistance to you with your coin. Thank you.