Queen Victoria penny black stamp from 1840.  This is SG2 1d black, with markings and positioning of the corner letters RE; indicating that this comes from plate 1b.  Cancelled with a red Maltese Cross.  This is a 4 margin example.. Small crown watermark (W2).  Stanley Gibbons 2025 Catalogue now sets an RRP for stamps that they would sell and a fine 4 margin example for plate 1b with red MX would be £425.  Please refer to scans for condition.