Serial range prefix can be employed up to now the calendar year of manufacture of the Marlin 336. It is also appropriate for probably the most other Marlin firearm build dates from 1946 on the current. This morning, out running some errands & I received an email from my LGS, https://strapweaponshop.com/product/marlin-model-1895-dark-series-45-70-govt-rifle-16-25/