Citizen CB1 Series Instruction Manual page 20

Notes on the time signal reception
Note on the time signal
This watch receives the time signal from the five signal stations located in four regions
and automatically adjusts the time and date. The receivable signal stations are listed as
follows:
Signal stations
Fukushima station, Japan
Kyushu station, Japan
Fort Collins station, Denver, Colorado, USA
Mainflingen station, Southeast Frankfurt, Germany
Shangqiu station, Henan, China
Refer to the maps on pages 19 to 21 to see the locations of the signal stations and their
receivable area roughly.
18
Kind of the time signal
JJY
WWVB
DCF77
BPC