Protective mesh screens are mounted on the siren's three openings to keep out birds and debris.
The Model 2 was first introduced in 1929 alongside the Fedelcode line of sirens, replacing the antiquated and lackluster Type B.
It is also worth noting the Long Legs lacked the intake cone and stator ring for stabilizing the housing that newer sirens feature.
Although these differences are quite noticeable, the basic formula for the Model 2 has remained constant since the first ones were built around 1929.
A small motor located at the base of the siren would oscillate a gear which would move a metal shaft leading to the stator.
When ever the bottom gear oscillates back and forth, the shaft would rotate and cause the stator to open and close making a "coded" signal.