try www.e-gunparts.com or www.gunbroker.com you may have some luck there.
Lender's royal service # 117709
Have it examined by a competent gunsmith
No known published sn data
Possibly Enders Royal Service? Blue, Hound, Whistler are a few others
Some Enders Royal Service shotguns are Crescent Model 60's marked with Shapleigh Hardware's trade name, but some were made by other manufacturers.
The value of an Enders Royal Service double barrel shotgun with serial number 262910 can vary widely based on its condition, age, and market demand. Generally, such shotguns can range from a few hundred to several thousand dollars. For an accurate appraisal, it's best to consult a firearms expert or appraiser who can evaluate the specific details of the shotgun. Additionally, checking recent sales of similar models can provide a better estimate of its current market value.
Enders Special Service & Enders Royal Service along with Enders Oakleaf were made by Crescent Fire Arms Co. for Shapleigh Hardware Co. of St Louis, MO in the early 1900's. It is not a rare gun nor expensive. Perhaps $200 if in good condition.
Enders Royal Service shotguns were distributed by HD Folsom to the hardware trade from c.1890-1920. They were imported from Belgium (will have proofmarks) and made domestically by at least two different manufacturers.
Being a .410 helps, the condition hurts. Possibly $200. sales@countrygunsmith.net
Not readily. You'll find that parts will need to repaired or made by a gunsmith.
Enders Royal Service shotguns were produced in the mid-20th century, primarily in the 1950s and 1960s. To determine the specific year of a particular shotgun's serial number, it's essential to consult manufacturer records or reference materials specific to that brand. Serial number patterns can often provide clues about the production year, but this can vary by model and manufacturer.
Carl Enders, Suhl Germany. Made high quality double barrel 12 gauge shotguns from 1835 to 1890. They had ornate checkering and engraved metal work. Depending on the condition and workmanship the value is between $500-$1150.