This one is easy to date. I talked with Bishwan Das back in 1997 and showed him some pics of a RR Sitar I have with this hand etched label. Bishwanji confirmed the date as 1947, when the shop first opened up at the New Delhi address. BTW, current labels will show "G Block" instead of "A Block" as a result of the officials that be revising the street addressing. There's a date boundary for approx year 2001. Check with RR for exact date. Cheers! Tony K.