Holt's urethral dilator

1799-1870

Holt's urethral dilator and 4 cannulae

1851-1894

Urethral stricture dilator with ivory handle

1801-1900

Holt's urethral dilator

1840-1890

Harrison's urethral dilator

1840-1890

Holt's urethral dilator and two cannulae

1810-1850

Holt's urethral dilator with 6 cannulae

1850-1900

Holt's urethral dilator and three cannulae

1874-1910