Unusually nice. This is a Vibrating shuttle model made by White and distributed by AG Mason. Uses a 20x1 needle but a common 15x1 will also work if lowered a bit. Shuttle and bobbins are unique to White. I'd guess made in the 1910's but the serial number can be dated. White made excellent machines and were very popular, perhaps 2nd to Singer in machines sold. Top notch cabinet work.
Jon