Yes. I confirmed the serial number with the seller, it is No 205. The highest number reported to me so far is 1104.
Also the C#-D# length is longer than the later ones - 255mm - about the same as the mid century Rudalls. We have yet to work out what that really means for a Siccama flute, but it’s about the same as my No 321, which is a beaut instrument.
The seller gives the overall length and sounding length, but they are about the same as all Siccamas. Bears out my assertion that sounding length really doesn’t tell us much!