The WXD3590 series from Sharma Electro Components is no longer available. As seen below, on the casing of the potentiometer it should list the resistance, this is needed to determine which model is right for your application. The tolerance is also noted, +/-5% is standard though others were available.
Using the specifications from this datasheet, I was able to narrow down the list of similar alternatives to these, there are a few filters left to help narrow it down further, the most important of which will be the resistance. Please review the datasheets and choose the one that best suits your application.
Sharma Part Numbers
| WXD3590S-1-101 | WXD3590S-2-101 |
| WXD3590S-1-201 | WXD3590S-2-201 |
| WXD3590S-1-501 | WXD3590S-2-501 |
| WXD3590S-1-102 | WXD3590S-2-102 |
| WXD3590S-1-202 | WXD3590S-2-202 |
| WXD3590S-1-502 | WXD3590S-2-502 |
| WXD3590S-1-103 | WXD3590S-2-103 |
| WXD3590S-1-203 | WXD3590S-2-203 |
| WXD3590S-1-503 | WXD3590S-2-503 |
| WXD3590S-1-104 | WXD3590S-2-104 |
