My guess, from the hair style and what little I can see of the clothes, that this studio portrait was shot somewhere from the early to mid twenties to the early thirties. A black and white photo, properly processed can last well over 100 years. I have glass negatives and tintypes in my collection that are as good as the day they were made. As photography moves further into the digital age, I have to wonder if we are beginning an age were our photographic heritage will survive. Computers crash, discs degrade and color prints fade quickly.