Trombone Mouthpiece Bach 5G deep period

This is a Bach large-bore tenor trombone mouthpiece, model 5G.
It features the old engraving from the so-called deep period and is believed to have been manufactured in the 1970s.
There are no dents or dings that would negatively affect its playability.
Although it is a 5G size, it feels slightly shallower than current 5G mouthpieces, offering a playing feel closer to a 5GL.
Another individual piece from the same period will also be listed, so please comment if you wish to purchase both.