Yes and No. A style D Tibia was a "regular" scaled Tibia Clausa, voiced on 10 inch wind pressure. Wurlitzer was very picky about their product leaving the factory built to an exacting standard. One of the Wurlitzer part numbers is Y106MS, which is Buckskin...the typical leather used for their Tibia Clausa mouths. Each stop built in the factory, (as well as everything else), had an accompanying "work tag" that followed the stop through it's complete production process. That work tag was pre printed with every detailed step of the fabrication of that stop, with a space on the tag for the individual worker to initial after he had finished the next step in the production process. These work tags were scrutinized by department managers (Wurlitzer was famous for their inner office and inner factory paperwork), to account for ongoing labor costs of individual workers, and also to detect workmanship flaws at the end of the production process. For this reason, you can be sure that "leathering lips" was one of the specified steps on the work tag in the production process of a Tibia Clausa. Your Style D Tibia almost surely left the factory with leathered lips.
I have seen as many unleathered Tibias as I have leathered ones, in my own experience. However, most unleathered examples I've seen have had remaining evidence of leathered upper lips being there at one time, (discoloration of the wood, remaining traces of old glue, etc. etc.).
Occasionally, there were specific requests made by organists when a new organ contract was signed. (You might suspect that an organist requested your Style D Tibia without leathered lips). However, voicing details were usually ignored by the factory. Requests for a different stop than called for in a particular model organ were usually honored by the factory, but that was about the extent of changes that would be made by the factory.
....."next" is a four letter word. Jay999