| Covers listed | |
| 1913: | 1 January, 15 January, 1 February, 15 February, 1 March, 15 March, 1 April, 1 May, 15 May, 1 June, 15 July, 1 September, 15 October, 1 November, 15 November, |
| 1914: | 1 January, 15 January, 1 February, 15 February, 1 March, 15 March, 1 April, 1 June, 1 August, 1 November, 1 December, |
| 1916: | 12 March, |
