Dug out my old Seiko calculator watch C153-5007 and I’m wondering if anyone knows the battery number for it?  Thanks!

THANKS, ADAM!  I HAD THE WATCH OPEN BUT JUST BROKE DOWN AND TOOK IT TO A WATCH REPAIR WHERE HE JUST CHARGED ME $5.  HE TOLD ME THE BATTERY USED TO BE A 390 BUT THE CLOSEST SIZE THEY MAKE IS THE 389.  THANKS AGAIN!

Hi old watch guy. The C153 uses Seiko SB-BU. You can use any of these easily available

Seiko SB-BU batteries
Renata 389
UCAR 389
Eveready 389 batteries
Energizer 389 batteries
UCAR 389 batteries
Renata 389 watch batteries
Rayovac 389 watch cell
Sony SR1130W
Energizer 389 button cell
Eveready 389 watch cells
National Panasonic SR1130W
Toshiba SR1130W
UCAR 389 button cell
Duracell D389 battery
Bulova 626
Varta V389 batteries
Citizen 280-15

regards

Adam