The Maxberg specimen preserves feather imprints covered by a thin sedimentary layer that obscures many fine details of the feathers. This may be a consequence of decay and disintegration on the lagoon floor. In the few feathers where detailed morphology can be observed, their structure appears identical to the plumage of other "Archaeopteryx" specimens. The left wing preserves the better plumage and shows flight feathers firmly connected to the arms. Though the wings overlap each other enough that assigning feather attachment points to individual bone regions is not possible, it does appear, consistent with other specimens and modern relatives, that the long primary feathers are attached to the second manual digit. The feathers of the right wing are considerably more damaged; so many feathers are missing that only a few can be definitively linked to the ulna, designating them as secondary remiges. One small feather is isolated next to the right humerus, suggesting that the animal's feathers had fallen out prior to or shortly after decomposition. Numerous small feathers proposed to be coverts are observed next to the second metacarpal and the phalanges, partly overlapping the shafts of the flight feathers. Feather "breeches", similar to those observed in the Berlin specimen, are found around the tibial region. The Haarlem Specimen (TM 6428/29, also known as the "Teyler Specimen") was discovered in 1855 near Riedenburg, Germany and described as a "Pterodactylus crassipes" in 1857 by von Meyer. It was reclassified in 1970 by John Ostrom and is currently located at the Teylers Museum in Haarlem, the Netherlands. It was the very first specimen, despite the classification error. It is also one of the least complete specimens, consisting mostly of limb bones and isolated cervical vertebrae and ribs. In 2017, paleontologists Christian Foth and Oliver Rauhut concluded that the specimen represented an animal more closely related to the Chinese "Anchiornis" and introduced the generic name "Ostromia". The commonly-used names of this specimen come from the old Dutch city of Haarlem, as well as from the city's Teyler Museum, named for its founder Pieter Teyler van der Hulst. In the 19th century the museum acquired a huge number of fossils from Solnhofen, and between 1863 and 1868 it listed over 12,000 fossils in its paleontological collection.