Holt's urethral dilator
1799-1870
Urethral stricture dilator with ivory handle
1801-1900
Holt's urethral dilator
1840-1890
Holt's urethral dilator and 4 cannulae
1851-1894
Harrison's urethral dilator
1840-1890
Holt's urethral dilator with 6 cannulae
1850-1900
Holt's urethral dilator and two cannulae
1810-1850
Holt's urethral dilator and three cannulae
1874-1910