RARE WW1 38th Infantry \"Cyclone\" Div Isorel Masonite SSI Enameled Insignia Sign For Sale

This sign shows the early shoulder sleeve insignia (SSI) adopted by the 38th Infantry \"Cyclone\" division of the United States Army.YOU WILL BE RECEIVING THIS SIGN ONLY, THE SET PICTURE IS FOR INFORMATIONAL PURPOSES.From a nearly? complete set of signs that are shown in the third picture. This set consists of each of the shoulder sleeve insignia used by units from the 1st world war, and are a very hard, glossy paint that I am assuming is an enamel on a confirmed Isorel board painted black, and measures 12 x 12 inches (30.48 cm). They are separated by that thin black paper packaging so common in that era. I am certain that it is Isorel by the cross like pattern of the pressing on the back which matches the Isorel pattern exactly. Isorel was the precursor to Masonite, which was not patented until 1924 and did not begin mass production until 1929. This set was likely produced some time after the war as most units did not have an insignia until then.
About the set:
This is obviously a very rare set and I am confident that it was issued by a significant organization, maybe even the US Military given the quality of the signs. I have had speculation on what they could have been for and it has been suggested that they might have been for a veterans group, but I think that they might have been used more for design purposes, possibly by a company that was in the business of supplying the newly adopted insignia patches to the various units in the US Military. Each of the 85 signs in the set have a hole on the top and bottom of the sign which I believe would be used for mounting, and they appear to have been extensively used. I will be offering each sign for sale individually so please be sure to stay tuned to my other listings as these become available.
About the 38th:
The 38th Infantry Division (\"Cyclone\") is one of the eighteen divisions of the United States Army, and one of eight National Guard divisions. It is headquartered in Indianapolis, Indiana, and contains Army National Guard units from Indiana, Ohio, Kentucky, Delaware, Michigan, Tennessee and West Virginia.The division was activated in August 1917 as a National Guard Division. After hastily building up a base camp at Camp Shelby, the soldiers of the 38th Division began training in October 1917. Equipment for training was chronically short, forcing leaders to fabricate dummy artillery pieces from wood and iron scrap, while the soldiers drilled with pieces of wood simulating rifles and machine guns. In April 1918, a springtime tornado struck Camp Shelby with enough force to damage the tent city and kill one soldier. On his assumption of command of the 38th Division on 30 August 1918, Major General Robert L. Howze commemorated the tornado by announcing the division would be known in the future as the \"Cyclone Division\".The division deployed overseas to Europe in October 1918, where it landed in France at the height of the German \"Peace Offensives\". Because the division was not combat ready, it was largely stripped of officers and men, who served as replacements for units already in combat. However, several of the regiments remained intact (for example the 138th and 139th Field Artillery) and were involved in collective training when the Armistice took effect on 11 November 1918. The only Divisional unit to see significant action in the World War was the 150th Field Artillery, which was organized from the prewar First Regiment Field Artillery. The 150th Field Artillery was attached to the 42nd Infantry Division, and gave good service during the six major phases of the autumn 1918 offensives.The division\'s shoulder sleeve insignia (SSI) is a spade shaped shield, bordered in green (post ww1), with the right half red, the left half blue. Superimposed on the shield is a white monogram \"CY\" which alludes to the divisional nickname \"the Cyclone Division.\" shlf