Andy,
For any new ship which has just sailed I like to get (10) $.50, (10) $1, (4) $5, (4) $5 Inaugural and (1) $25 chips. I have everything up to the latest ship that has sailed. For the record there are many variations of several chips. For example, Sovereign OTS has (4) different $1 chips. Nordic Empress has (3) different $.50 chips. And there are many more such variations.