That is a beautiful bass. The detail is wonderful without being too much.
My father-in-law has a 5-volume Encyclopedia of Violins and Violin Makers. If you want I will look up the maker and see what they say about him. It would probably take me a week or two to get the books. If you want me to, tell me any more info you have about it, like Pollmann's first name, or the year it was made, or the town it was made in. Sometimes (especially in the old days) you would have several generations of makers with the same last name. It can be impossible to tell much from the last name only. Some family members were masters while others were only so-so. If the info on the Pollmann who made it is lengthy and others don't want it posted here I could E-mail it to you if that's okay.
Rich