Descriptions :
ROLEX Solid 9K Yellow Gold 1st Oyster Manual Wind Sub-Second WW. Circa 1920s.
Dial :
Signed and original White Porcelain dial appears to be in Excellent to Mint condition with NO crack or hairline mark. Hands are Blue Steel and appears to be in good condition.
Case :
Signed and original Solid 9KYG 3 pieces case appears to be in excellent condition with very minor fine light scratches from wear which can hardly be seen. Wire lugs are also in excellent condition. This watch also comes with an inner DUST cover. Signed Oyster screw down crown.

Size Measured = approx. 32-33mm without lugs and crown.

Movement :
Signed and original 15 Jewels manual wind movement appears to be in nice and clean condition as shown on picture. 
Remarks :
Watch do run on 1st wind and appears to be running quite well.