You may look at "Sahay, A., & Pillai, A. (2009). Differential impact of advertising and distribution expenditure on Tobin's Q: A perspective from listed firms in India. Journal of Indian Business Research, 1(2/3), 77-94." for guidance although it does not fully answer your query.
As brand`s value appears as one of the sources of the difference bw book and market value, you can gauge its value with Tobin`s Q. However, the classical tool is (if available) a report like Interbrand. The problem is with local brands (although you can look at the Indian report). I enclose one of the classical works on brands' valuation, I hope it is helpful!