Thank you for your info.
When compared side by side in this way,
the characteristics of the two grains seem to be quite different,
but what do you think?
It is presumed that the pickup installed on this SA-75 is made by Maxon,
but I don't know the details.
If anyone can guess from the state of the details, please tell me.
I wanted the shop to remove the front pickup and to see the image taken inside the pickup cavity,
but they refused to do so. So I gave up the purchase.