Hi Anst,
Towa /Geller TX-500 manual is here:
http://the-checkout-tech.com/manuals/cashregisters/Towa_TX-500_operating_programming_manual.html
Other Towa and Geller models they have are:
AX-100
http://the-checkout-tech.com/manuals/cashregisters/Towa_AX-100_operating_programming_manual.html
CX-200
http://the-checkout-tech.com/manuals/cashregisters/Towa_CX-200_operating_programming_manual.html
ET-5321
http://the-checkout-tech.com/manuals/cashregisters/Towa_ET-5321_operating_and_programming_manual.html
ET-5616
http://the-checkout-tech.com/manuals/cashregisters/Towa_ET-5616_operating_programming_manual.html
ET-6600
http://the-checkout-tech.com/manuals/cashregisters/Towa_ET-6600_user_manual.html
ET-7626 (Geller MP2)
http://the-checkout-tech.com/manuals/cashregisters/Towa_ET-7626_and_MR1_programming_manual.html
NT-1071
http://the-checkout-tech.com/manuals/cashregisters/Towa_NT-1071_user_and_programming_manual.html
PZ-1
http://the-checkout-tech.com/manuals/cashregisters/Towa_PZ-1_operating_programming_manual.html
SX-580
http://the-checkout-tech.com/manuals/cashregisters/Towa_SX-580_operating_programming_manual.html
SX-680
http://the-checkout-tech.com/manuals/cashregisters/Towa_SX-680_operation_programming_manual.html
TL-550
http://the-checkout-tech.com/manuals/cashregisters/Towa_TL-550_operating_programming_manual.html
ML-780
http://the-checkout-tech.com/manuals/cashregisters/towa1.ph
Registerman
September 2010