| Class | Date Established |
|---|---|
| 246 | 1918 |
| 248 | 1935 |
| 249 | 1965 |
| 250 | 1912 |
| 251 | 1954 |
| 252 | 1940 |
| 254 | 1914 |
| 256 | 1913 |
| 257 | 1992 |
| 258 | 1913 |
| 260 | 1938 |
| 261 | 1916 |
| 264 | 1963 |
| 266 | 1915 |
| 267 | 1919 |
| 269 | 1961 |
| 270 | 1916 |
| 271 | 1916 |
| 273 | 1924 |
| 276 | 1916 |
| 277 | 1962 |
| 278 | 1920 |
| 279 | 1918 |
| 280 | 1919 |
| 281 | 1918 |
| 283 | 1918 |
| 285 | 1956 |
| 289 | 1918 |
| 290 | 1918 |
| 291 | 1918 |
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