This first piece is a scan of a sheet showing the two main currencies, both based on a silver standard. The top is the Kamerian coinage, with it's dragon motif. The coins are your standard copper, silver, gold (crown), platinum (royal) but the higher denominations also have inset gems (what a nightmare that would be). Also shown is the mithril coin which has no need for markings, being mithril and all and worth about 125 sp.
The second bit here is a copy of the Delborian Calender. I handed out a calender for the players to keep track of events and things. The calendar had 13 months each 35 days long being a 'small' year and 4 of these small years for every 'great' year (based on the cycles of the moon re-aligning in Summer). It had the moon phases drawn on it because the moon phases impacted some types of magic and sometimes things might be based on the moon phases (like lycanthropy, demons, terrible prophecy). Mostly they just wrote people's birthdays on it. It was great when a birthday came around and they bought/stole/made each other gifts.