Arrangement of a vocal piece for two equal choirs singing the same material a half measure apart. Here, you can bring the same effect using handbells and optional keyboard. To maintain the echo effect in this transcription, the handbell ensemble should be softer than the keyboard. The dynamics are indicated to reflect this intent.
Another option is to have two handbell ensembles each playing the handbell score a half measure apart. In this case, the keyboard score would not be played.

