As I have said many, many, times over, using coins to date bows is unreliable.
I have one of the earliest "Halloween" bows, and it was never drilled for a coin, and does not have a coin at all ... Also have other 1959 Bear bows that were never drilled for a coin.
No coin bows can be real puzzlers for the Bear coin daters.
Any coin could have been put in any bow at any time...
The 1959 Alaskans have thin grips. Thin like 1959 Kodiaks or 1959 Grizzlys. The 1960 Alaskans have fat grips, much in the same manner as 1960 Kodiaks and 1960 Grizzlies.