British Trade Dollar Year 1907 (A Scarce Year and a few known 1907/7B)

British trade dollar 1907 is a straight forward year.
It has a total mintage of 1,945,726.
This relative low mintage amount makes this a better date / scarce date coin.

It has only two variant - 1907B and 1907/7 B (retooled die according to NGC)

Variety 1 - British Trade Dollar 1907B
Minted by Bombay Mint.
I was quite lucky to have collected few nice pieces of 1907B BTD.
They are among the best coins in the collection.

Nice details overall.
Most UNC normal regular strike silver coins will have grainy surfaces
One way to differentiate these remnants is original or bagmark / surface hairlines is looking at this grains to see if it is incused or raised. (Raised = from the mint, Incused = bagmark / hairlines)

Variety 2 - relatively unknown 1907/7B British trade Dollar
If you go to the British trade dollar mintage table, the lower section table from NGC.
There is a variety from 1907/7B British Trade Dollar
It is most likely a retooled die.

It came up in Mavin auction in Singapore earlier this year (2013). NGC graded.
This picture is taken from Live auctioner covering the auction.
I do not have this coin yet.

It is quite difficult to see the 7 retooled from this pic though.
However a closer examination from NGC pics, showed that the upper bridge of the 7 seems to be broken on the beginning part to the left.
Compare with the sample above, the "7"upper bridge in this retooled coin is shorter than the normal one.
And the normal 7 has a little curve at the head, the retooled one seems to have lost that curve at the beginning.