Gerdes R1665 R1675 H1674 H1780a H1780b S1535a S1549b S1606a S1606b S1630a S1665a S1674a S1749a S1812a S1812a S1812a S1829a S1829b S1829d StB29d S1840b S1840b S1860b S1860b S1860d S1860d S1860e U1749 U1820a B1674 B1840 U1840 B1860a