These marks are found on items decorated by hobbyists, as can be deduced from the quality of the decoration and the often present signatures or letters of those involved. Both the name "Marlboro" and its internal code "Form 120" can be found in the official form catalog of the Lorenz Hutschenreuther factory which created this dedicated export blank around 1910. These items then appeared in the US as "Peerless" marked items. Contrary to these clear facts, Replacements-dot-com tries to sell hobbyist-decorated, one-off items as if they were mass-produced, genuine goods (see their examples "PLE1", "PLE6", etc.).
Please note that there is no such thing as "Peerless Marlboro Blenheim" or "Blenheim Marlboro", nor is there a "Blenheim by Peerless" (code: BLEBLE), as claimed by Replacements-dot-com. If you look at a Hutschenreuther Form 170 "Racine" plate made for PASCO and carrying their "Blenheim" name, and compare it with a Hutschenreuther Form 120 "Marlboro" plate sold under the Peerless brand, you will see that they are very similar plates with gold daubs and trim. While one could argue that a pattern name would normally carry over, bear in mind that "Blenheim" was not Hutschenreuther-issued, but actually belonged to PASCO. Therefore, it should not be used decribing other Hutschenreuther items, regardless of how similar they are.