Related Clues:

• It may go with the floe
• Secure against leakage
• It makes an impression
• Bladdernose, for one
• Easter or Christmas issuance
• Elite Navy diver
• Impression
• Imprint
• Philatelist's find
• Philatelist's prize
• Corporate symbol
• Zoo attraction
• Make watertight
• Security feature
• Symbol of office