If the crown is stainless steel and the threads, clutch, and spring are all Ok it should be all right. Some have a brass inner threaded part with a steel clutch and cap and they hold up pretty good too. Be careful with crowns made out of cheapo 'pot metal' as they usually have trouble early on. I have had good luck with the crowns on JMB and StoneP cases. Genuine crowns are mostly made out of nickel silver with a steel cap and later 'monobloc' models are all steel. Many replica 6mm crowns are made to the same spec as a crown on a 16200...6mm od but take a 5.3mm case tube. Your 16000 case is all 6mm so make sure you get a 6mm crown made for a regular 6mm case tube. It is all in the crown info 'sticky' above. Prices have gone crazy...brand new 5.3/6.0mm steel crowns were $20 each in 1995, yellow gold 5.3/6.0mm were $35, 7mm steel were $35, and 7mm gold were $75 from a supply house on 47th St in NYC that I had an account with back then. The mechanic at a local rolex AD used to give me all the 'take off' crowns. Now take offs are going for $75+ each on eBay. A new genuine crystal for a 16000 DJ was $17.50, one for a 5513 was $15.50.