My Grandfather's Vega Banjo Mandolin Style K circa 1928 or 1930

My Grandfather's Vega Banjo Mandolin Style K circa 1928 or 1930 My Grandfather's Vega Banjo Mandolin Style K
It appears to have a serial number of either 90858 or maybe 80858 which based on a chart at http://www.mugwumps.com/acf_date.html would date it as either a 1928 or 1930 model.