(Some) older bicycle parts are referred to in the literature of the time as "nickel-plated".
Whenever I have asked the local plater guys about this, they say the chrome in chrom-plate is so thin it only puts a different colour on the nickel base, but they seem unwilling to just do nickel and skip the chrome step.
(Chrome on cycle parts has a mixed rep: it reduces rusting, but some say it promotes cracks; presuambly nickel plating only would be more ductile and not promote cracks.)
What sayest the group?