Continue to follow the adventure with...'Bell'!
 
Postcard front reads:
 
'Inspired by an old diving bell - ‘Bell’ is the name that the two time travellers - Walt & Ace have given to their remaining Timebubble Machine . Modifications made by Ace allow Bell to be driven remotely (using the R.C.B.M - Remotely Controlling Bell Machine) as they continue to adventure through TIME. As with all Timebubble Machines, Bell runs on Bubble Juice..'   
 
The rear of the postcard shows an image of 'Bell', the Timebubble Machine. The card is set up to allow you to write your own message, add an address and post...or perhaps you are adding this to your own growing collection!