What is the model number for the Flugelhorn made by Zigmant Kanstul Anaheim with Serial Number 5186?

The Flugelhorn made by Zigmant Kanstul in Anaheim with Serial Number 5186 is likely a Kanstul Model 152. The model number can typically be confirmed through the manufacturer's records or product catalogs, but the 152 is a well-known model associated with that serial range.