|Note_en= Advertising for the [[Parker 51]] in both ''regular size'' and ''demi-size'' reporting the [[Aero-metric Ink System]]. Mention also the ''[[Lustraloy]]'' cap. | |Note_en= Advertising for the [[Parker 51]] in both ''regular size'' and ''demi-size'' reporting the [[Aero-metric Ink System]]. Mention also the ''[[Lustraloy]]'' cap. |