HX-11    1913-1914 Excelsior single ( threaded connection )
HX-12    1911-1912 Excelsior 6hp twin ( threaded connection )
HX-14    1911-1912 Excelsior single ( threaded connection )
HX-16    1913-1914 Excelsior 7hp twin ( threaded connection )
HX-19    1912-1913 Pope K
HX-20    1912-1915 Pope H
HX-21    1912 Henderson 4 cylinder ( threaded connection )
HX-22    1913-1915 Henderson 4 cylinder ( threaded connection )
HX-25    1913 Crawford twin ( threaded connection )
HX-25    1913-1915 Dayton twins ( threaded connection )
HX-25    1912-1915 Deluxe ( all models) ( threaded connection )
HX-25    1913-1915 Eagle twin, 1913 M&M Twin ( threaded connection )
HX-25    1912-1914 Sears
HX-25    1912-1915 Spacke Single & Twin
HX-26    1907-1908 Indian Diamond Frame 5hp twin
HX-31    1912-1915 Reading Twin
HX-32    1910-1915 Reading Single
HX-33    1912-1913 Pierce Single
HX-34    Pierce 4
HX-37    1911 Yale Twin
HX-38    1911-1912 Yale Single
HX-39    1912 Yale Twin
HX-41    1913-1914 Yale Single & Twin
HX-42    1909-1913 M&M Single
HX-43    1912 M&M Twin
HX-46    1913 ( last 1/2) A.M.C. single & twin ( threaded connection )
HX-47    1913 (first 1/2) A.M.C. single & twin ( threaded connection )
HX-48    1912-1914 Flanders single ( threaded connection )
HX-50    1913 Blackhawk single ( threaded connection )
HX-51    Shaw
HX-53    1912-1913 Thor Twin
HX-54    1913 Feilback Limited ( threaded connection )
HX-56    1913 Iver Johnson Single & Twin
HX-57    1912-1913 Monarch Single & Twin
HX-60    1912-1916 Merkle Single & Twin
HX-62    1914 Thor 7 HP Twin
HX-65    1914-1915 Cyclone ( threaded connection )
HX-66    1914-1915 Feilback Limited ( threaded connection )
HX-69    1913-1915 Pope Twin
HX-71    1914 ( last half) Harley Davidson  twin ( threaded connection )
HX-74    1913-1916 Emblem singles & twins ( threaded connection )
HX-76    1909-1911, 1915 Indian  5hp twin ( threaded connection )
HX-78    1914 Harley Davidson  single, 1914, first half, twin ( threaded connection )
HX-79    1915 Yale Single & Twin
HX-84    1912-1915 Indian 4hp single ( threaded connection )
HX-85    1912-1915 Indian 7 H.P.
HX-86    1913-1915 Pope M
HX-88    1915 Flanders ( threaded connection )
HX-92    1915-1919 Thor 7HP & 9HP Twin
HX-94    1915-1917 Harley Davidson  single ( threaded connection )
HX-95    1915-1916 Harley Davidson  twin
HX-96    1911-1912 Wagner Single
Unmarked 1912-1913 Waverly Single ( believe they were also HX96 Model )
HX-102  1914 Thor twin, 1916-1917 Davis 7 HP Twin
HX-104  1915-1916 Excelsior twin ( threaded connection )
HX-105  1915-1916 Excelsior 7hp twin ( threaded connection )
HX-109  1911-1912 Harley Davidson  single ( threaded connection )
HX-110  1913 Harley Davidson  single ( threaded connection )
HX-112  1917 Indian Power Plus
HX-113  1911-1912 Harley Davidson  single ( threaded connection )
HX-118  1916 Henderson 4 cyl.
HX-121  1912-1915 Indian 7hp twin ( threaded connection )
HX-122  1916-1918 Excelsior big valve ( threaded connection )
HX-123  1916 Pope Twin
HX-125  1916-1924 Reading Standard
HX-126  1916 Harley Davidson  Racers
HX-130  1917-1919 Henderson 4 cyl
HX-137  1917 Harley Davidson 61" ( Obsolete part, replaced with 1130-15 )
HX-138  1917-1919 Excelsior twin
HX-146  1917 Pope Twin
HX-147  1919-1921 Indian Standard 72" N20, NP22-23
HX-151  1918-1919 Harley Davidson 61" ( Obsolete part, replaced with 1130-15 )
HX-153  1916-1919 Indian 7H.P Twin
HX-154  1921 Harley Davidson FD, FDA, JD, JDA ( 1131-21)
HX-156  1919 Harley Davidson flat & opposed twin, 1920-1924 Harley Davidson Sport
HX-158  1920 Reading Standard
HX-159  1920-1923 Indian Scout G-20-23
HX-160  1915-1924 Harley Davidson  F-FA, FE, J, JA, JE ( 1130-15 )
HX-161  1920-1921 Ace
HX-162  1917-1925 Excelsior 61"
HX-163  1920 Indian Daytona Racer
HX-164  1921-1924 Reading Standard
HX-167  1921-1925 Excelsior 72"
HX-174  1922 Indian Chief, Big Chief, H, HP-22-23
HX-175  1921 Indian Standard N-20-23
HX-176   ?
HX-179  1924 Indian Scout G24
HX-180  1922-1925 61",74" Indian Chief, Big Chief, H, HP-24-25
HX-181  1921-1925 74" Harley Davidson F, FD, J, JD optional, 1924 JE ?
HX-182  1920-1921 Indian 74" BV, 1920-1924 Indian Standard 61", 1920-1925 Indian Standard 72", N-24
HX-183  1920-1925 Ace 4 cyl.
HX-184  1924-1925 Indian Prince
HX-189  1924-1925 Indian Scout G-24-25
HX-190  1926 Indian Scout G-26
HX-191  1927 Harley D ( Industrial motor ? )
HX-192  ?
HX-193  Late 1920's Harley Industrial motor.