Brand: Meissner
Unfortunately, "Meissner 9-1091" is not a commonly used term or product name that I am familiar with. It could potentially be a model or part number for a specific product manufactured by Meissner, a German company that produces precision measuring instruments. However, without more context provided, it is difficult to determine the exact meaning or relevance of this term. I recommend providing additional information or clarification if possible, or consulting the manufacturer's website or customer support for further assistance.