Ritchey Logic bottom brackets: no dust seal?

[foxb13]

Hi,

Just wondering, as I couldn't find a NIB Ritchey Logic bottom bracket, only NOS, opened box. Did they come with a dust seal, as Shimano BB-M730 bottom bracket for example (part #9 in https://si.shimano.com/fr/pdfs/ev/BB-M730-1090/EV-BB-M730-1090.pdf)? If no, is it recommended to install one? If yes, any compatible brand/model you would recommend?

Thanks!