| Heading and notes: | No form number. CABLEGRAM. | 
| Message area: | Blank with Pacific Cable Board logo on the left. | 
| Reverse side: | Comment in red about reply. | 
| Colours (text & envelope): | Red on grey-green or brown. | 
| Size of envelope overall: | 78 × 135 mm. | 
|  | IAP-EC-1A. Used Cablegram delivery envelope. | 
|  | IAP-EC-1 (reverse). Reverse side of the above used Cablegram delivery envelope. | 
|  Sold at Phoenix Auctions 2013. The cover had previously sold for $3,200 +GST + commission at Prestige Philately in June 2005 Lot 1213. | IAP-EC-1B. Norfolf Island via Sydney to Vila, New Hebrides. Used Cablegram delivery envelope. 
 An important and rare registered cover despite being slightly soiled and having a repaired tear on the upper edge. | 
|  | Reverse side of the above envelope showing an exceptionally clear Pacific Cable Board oval date stamp for Norfolk Island Station of 12 A0ril 1907. | 
Details of use and rarity.
| Form sub-number | Schedule number | Earliest recorded date | Rarity rating | 
| EC-1A | None | Date of use unknown. | RRR | 
| EC-1B | None | 12 April 1907 at Norfolk Island. | RRR |