I looked in some of my resource books for similar models. There were actually many potbellys with similar looks. Based on the fine detail differences, the receiver assembly, and face plate design, I am almost certain this is a 1900 Connecticut potbelly candlestick. You can find a reference to it in "Telephones. Antique to Modern, by Kate Dooner, on page 97. THey estimate the value at $3000 to $4200, of course in like new condition. If I get time I'll take a photo and attach it. Hope this helps.
Ken