| Eckert, John S.; 1920 Red Book; 1920 | 1920 Red Book | 1920-00-00 | WISSAHICKON | Chief Engineer |
| Eckert, John S.; 1923 Red Book; 1923 | 1923 Red Book | 1923-00-00 | WISSAHICKON | Chief Engineer |
| Eckert, John S.; 1925 Red Book; 1925 | 1925 Red Book | 1925-00-00 | WISSAHICKON | Chief Engineer |
| Eckert, John S.; 1926 Red Book | 1926 Red Book | | DANIEL WILLARD | Chief Engineer |
| Eckert, John S.; 1927 Red Book; 1927 | 1927 Red Book | 1927-00-00 | DANIEL WILLARD | Chief Engineer |
| Eckert, John S.; 1928 Red Book; 1928 | 1928 Red Book | 1928-00-00 | DANIEL WILLARD | Chief Engineer |
| Eckert, John S.; 1929 Red Book; 1929 | 1929 Red Book | 1929-00-00 | DANIEL WILLARD | Chief Engineer |
| Eckert, John S.; 1930 Red Book; 1930 | 1930 Red Book | 1930-00-00 | DANIEL WILLARD | Chief Engineer |