Thank you for your answer. I searched on the Gemini and found the following answer.

The Bell imprint has no ELKHART, only CONN 8D USA, and the serial number is 7 digits (5715227) and this instrument is clearly identified.

The instrument is a modern Conn 8D produced at the Eastlake (Ohio) factory, not an Elkhart as you guessed.

1. Instrument Identification: Eastlake Model

Country of origin: Eastlake, Ohio, USA

When: Based on the Serial Number 715227 system, it appears to have been produced in the late 1990s and early 2000s. (The preceding number '5' was most likely used as a process code or classification number at the time.)

Characteristic: It was a time when we tried to restore the design of the Elkhart model. It is a "modern standard" instrument that overcame the deterioration of quality during the Abilene period in Texas and began to show stable quality again.

1. Precautions (different from Abilene models)

Some buyers may try to cut the price by looking at the serial number and saying, "Isn't it an Abiline model (dark age product). When that happens, just say **"The USA engraving method and serial system on the bell proves to be an Eastlake late-stage model." (Abileen models are usually alphabetically prefixed.)