23 Contract liabilities

	31.12.2018		31.12.2019
	Current	Non-current	Current	Non-current
CHF 1,000
Timing of revenue recognition: point in time
Advances for products	15,399	31,783	14,349	22,667

Timing of revenue recognition: over time
Advances for products	1,428	–	990	–
Service contracts, including service-type warranties	20,565	3,016	20,883	3,280

Total contract liabilities	37,392	34,799	36,222	25,947

Decrease		(3,940)		(9,335)
Translation differences		(512)		(687)
Total change (current and non-current) compared with previous year		(4,452)		(10,022)