SOCIÉTÉ NAVALE CAENNAISE.

Sources differ over normal or squared lettering, punctuation and band widths. Nüsse’s squared letters match S496, whereas funnel photographs and the historical website show rounded letters as in S497. Lloyds 1912 omits the dot after S found in 1904; most sources omit dots and give equal flag bands. Merchant Ships calls S497 an alternative, possibly placed low on the funnel.

The FOTW description gives a 1:2 flag divided white–red–white in proportions 1:2:1, with white SNC on the red stripe.