A Series Notes (1928 - 1975/77) 

10 Shilling Note

Colour: Orange

Size: 78 x 138 mm

Security feature: Main Watermark (Head of Erin)

Date on first notes: 10/9/28

Date on last notes: 6/6/68

A Series 10 Shilling note - front A Series 10 Shilling note - back


£1 Note

Colour: Green

Size: 84 x 151 mm

Security feature: Main Watermark (Head of Erin)
Metal Security Thread introduced July 1971

Date on first notes: 10/9/28

Date on last notes: 30/9/76

A Series £1 note - front A Series £1 note - back


£5 Note

Colour: Brown

Size: 92 x 165 mm

Security feature: Main Watermark (Head of Erin)
Metal Security Thread introduced January 1971

Date on first notes: 10/9/28

Date on last notes: 5/9/75

A Series £5 note - front A Series £5 note - back


£10 Note

Colour: Blue

Size: 108 x 191 mm

Security feature: Main Watermark (Head of Erin)
Metal Security Thread introduced May 1971

Date on first notes: 10/9/28

Date on last notes: 2/12/76

A Series £10 note - front A Series £10 note - back


£20 Note

Colour: Red

Size: 114 x 203 mm

Security feature: Main Watermark (Head of Erin)

Date on first notes: 10/9/28

Date on last notes: 24/3/76

A Series £20 note - front A Series £20 note - back


£50 Note

Colour: Mauve

Size: 114 x 203 mm

Security feature: Main Watermark (Head of Erin)

Date on first notes: 10/9/28

Date on last notes: 4/4/77

A Series £50 note - front A Series £50 note - back


£100 Note

Colour: Olive

Size: 114 x 203 mm

Security feature: Main Watermark (Head of Erin)

Date on first notes: 10/9/28

Date on last notes: 4/4/77

A Series £100 note - front A Series £100 note - back