JT 1839 steel crown with 55 teeth

JT 1842 steel crown with 37 teeth

JT 1845 steel crown with 37 teeth

JT 1847 steel crown with 48 teeth

JT 1847 steel crown with 51 teeth

JT 1873 steel crown with 48 teeth

JT 1874 steel crown with 56 teeth

JT 1875 steel crown with 48 teeth

JT 1876 black zinc crown with 43 teeth

JT 1876 black zinc crown with 44 teeth

JT 1876 black zinc crown with 45 teeth

JT 1912 steel crown with 42 teeth

JT 1925 steel crown with 51 teeth

JT 1950 steel crown with 48 teeth

JT 1977 steel crown with 45 teeth

JT 1977 steel crown with 48 teeth

JT 2011 steel crown with 44 self-cleaning teeth

JT 2012 steel crown with 42 teeth

JT 2020 steel crown with 41 teeth, 520 pitch, self-cleaning

JT 210 steel crown with 38 teeth

JT 210 steel crown with 45 teeth, 520 pitch, self-cleaning

JT 210 steel crown with 47 teeth, 520 pitch, self-cleaning

JT 210 steel crown with 48 teeth, 520 pitch, self-cleaning